I dislike the Goff special rules granted by their formation. The reason being, concussive is one of the most useless special rules,
IMHO. It only effects the MODEL you actually hit (wound?) with the attack. The likelihood of concussing a model worth the downgrade is slim :(
(Especially since only the characters get the rule, meaning you will likely get 1 or two attempts to concuss)
Love the Mega/Mek Mob one, simply because I fething love Ork vehicles despite their general cruddy stats.
Madboyz seems stupidly fun
Skarboyz actually seems like it could be fairly powerful...really powerful, with the right support. S4 base boyz is pretty darn good. S5 on the charge is even better. A Weirdboy to potentially add +2 on top of that would be silly
I love both Speed Freak bonuses. Especially the disembarking even after moving past 6'. Zip up, bail out, and hunker down a turn before rushing in :p
Unsure how I feel on the Wildboyz one though. I suppose spamming
FNP/Rending Boy Blobs might be pretty rugged, specially just standard slugga/choppa boyz.