Martial Power!!! (Give the martials something to do other than "attack again")

[Kane0]

It sorta followed BAB as 'caster level'

Edit: if modelling off say Prof bonus, you would unlock new martial-powers at levels 1, 5, 9, 13 and 17 for the categories (skills?) You are proficient in.
It would be interesting to see what it would be like if possessing spellcasting delayed your power progression, like for example you 'effective' prof bonus for powers was reduced for every spell level for which you had slots (so a full martial could still get cantrips, racial and feat casting without issue)