Feel no pain would be a cool upgrade to represent big nobs, warbosses and maybe skar boyz.
hmm. i think S4 choppas is a lot - what i think orks need is a boost to mobility. nothing like fleet (heavens forbid!) but maybe a mob size check can do more things than just double I on the charge. perhaps there could be a list of various things like:
Mob Size
you can make a mob size check for any unit at the beginning of the ork turn. a unit that passed the check can make us of
one of the following rules in its turn:
- move 2d6 instead of 6 in the movement phase
- reroll failed shooting rolls (the ork mentality of believe it will happen and it will!)
- double I on the charge
- add +1 S on the charge
etc etc