The key to the Mek Gunz is in their upgrade weapons. The Lobba is a free swap that gives an S5 barrage blast but frankly I'd rather keep the option of having S8 if I've not got the points to spend on upgrading the gunz. The Zzap gun is cheaper than before but unreliable and potentially lethal if it Gets Hot. That's the old weapons covered. The rest are sort of new in that some of them have appeared elsewhere before.
It has been pointed out to me that I've got the wrong end of the stick with the bubblechukka. When I read it in White Dwarf I actually got it right but whilst writing this I forgot that it's one dice for S and AP. That means it's probably most useful on a "3" as you're then killing marines on 5+ (assuming no cover). Of course it suffers the same issue as any blasts in that people don't normally let you get many hits thanks to model spacing.
The way I see it the best loadout will be a mixture. Stick in a couple of traktors and then some smashas to give the best chance of dealing with flyers and vehicles alike. Only problem with that is that half of your weapons are useless half of the time i.e. they're snap shooting against ground/air targets. Running them cheap as massed kannons or lobbas might be fun as a distraction too. Realistically the Bubblechukka could be awesome or awful but most of the time will be average so I'll probably avoid it.
The deff rolla isn't as good as before as it's now for ramming instead of Tank Shock but gets a reduction in cost as a result. Grabbin klaws are still fun but incredibly situational. Boarding Planks are pretty good but not sure they're worth the points.
I think the main benefit for the Battlewagon comes from the 7th edition vehicle changes. AV14 got that little bit harder to deal with so I expect we'll see more Battlewagons again. They aren't particularly brilliant but present a good way of getting a big mob of Orks into combat.
Of course Grot Riggers and Extra Armour help but I can avoid the feeling that you're piling points into something that won't make a difference. Of course, if your opponent is shooting your dread they're not shooting your other vehicles and you could potentially hide them behind a Stompa/Gorkanaut to get them up the field safely. Still, I think there are better options in this segment much as it pains me to say it.
Grot Riggers are pretty cheap for them but then they're only 2 HP so IWND is of limited use and Armour Plates are too expensive on a relatively cheap vehicle. Run them cheap as a first wave of attack and don't worry too much about losing them, they're grots after all!
Remember that giving a big mek a KFF and putting it inside a Gorkanaut is not the same as the Morkanaut's KFF. The changes to the KFF rules mean that only the Gorkanaut would benefit whereas the Morkanaut (confused yet) would be giving the 5+ save to surrounding models too.
Neither variant is especially quick as they're just walkers meaning you'll not be getting them into combat early. That pushes me further towards the Morkanaut too. Having AV13 and 5 HP is great but you're gonna need more than that to keep it alive long enough to transport its occupants and maybe get into combat. That means upgrades and of course increased cost. Let's look at an example. You could give a Morkanaut a KFF (5++ save), Grot Riggers (IWND) and pack it with 3 meks (+ 3 burnas). That means 5++ to deny the hit anyway and then you can try to fix it in the Shooting phase with 3 5+ rolls and then try IWND at the end of your turn if repairs fail. Basically that's four 5+ rolls to get HP back. Sounds pretty good until you total up the points and you're in the 400 pt ballpark. Still, it could be incredibly annoying for your opponent to shift.
Ultimately I think they're both a bit overpriced (both in points and £s) but I like the model so I'm determined to include one. They suffer a lot from not being assault vehicles but should provide a suitable distraction. As I say, you can also hide stuff behind them too.
Nice new models (finally) but it's difficult to decide how effective they'll be. It's a shame a lot of the customisation has gone from their weapons but S5 and a random AP could be excellent with so many shots. It's a shame they have to be static to make the most of their shots but with their reasonable range they should be able to stay out of trouble long enough. They seem fair expensive but they've got a Nob statline making them that bit more durable.
More than any other section the Heavy Support choices you make really depend on your army style. Horde armies might benefit from Lootas or Flash Gitz but mechanised forces will want Morkanauts and Battlewagons. The Heavy section isn't as exciting to me as Fast Attack was but there's certainly some potential here. I'm keen to try out some of the Mek Gunz but ultimately I think I'll find them too static to be truly effective. Definitely going to pick up a gorka/morkanaut soon though if just for the model.
One more section left and it's a short one so I'll try and get it [posted up tomorrow. Then I need to start deciding what I want to include in my Ork horde and get cracking on the painting.
I've been asked to include my thoughts on these so I'll put them here. Looted Wagons are a difficult beast as the rules struggle to reflect the variety of things you could use to model them. It's frustrating to use a land raider making a big model when a rhino chassis carries the same stats. Anyway, their basic cost has seen a slight increase but they retain their AV11 (which is a bit of a shame). You have a little bit more control over Don't Press Dat though as you simply have to move Flat Out whereas before you were forced to move straight forwards. Basically there's a 1/6 chance of not shooting.
For your points you get a 12 man transport that's got better armour than a trukk and comes with Tank (and therefore Tank Shock/Ram. That's not bad for essentially a 7pt upgrade to the trukk. Obviously you're limited in that it's a Heavy choice but for units like Tankbustas it might not be a bad idea to take a LW rather than the trukk.
Anyway, you can also upgrade your LW to take a killkannon, various small arms and a deff rolla. These soon start to rack up the cost of the model but since people are panning the battlewagon it might be an option. Still I think an AV11 vehicle isn't something you want to sink too many points into. They're not going to compete well in the Heavy section either.
Basically, it's great that they've given people the option to keep using converted models but I find it difficult to get too excited about them.