Maybe just a new skill: Hedge Cutting giving access to Oval Cut and Rectangular Cut on any uncut bush.
It would be cool if some bushes allowed to pass through them if one tries hard enough (aka "bugabusing"). Even better if each bush had it's own, random chance of success, so one can memorize which bushes are easier to pass through.
Also different types of bushes can have different base chance of passing through. Some blood and phlegm (or BB) damage is justified.