I'm considering a house rule that says that the level 2 monk's Step of the Wind can be used at will as long as the monk has at least 1 ki point remaining. Will this unbalance the game?
I'm considering this house rule because at level 2 a rogue gets Cunning Action, yet a monk must pay for a very similar privilege from a very limited pool that the typical monk would often prefer to use for something else.
Best Answer
I don't think it would cause a serious balance problem, especially if you are generally letting the players rest between each fight. However, it does make the monk significantly more damaging at very low level -- he still can't flurry and disengage in the same turn, since they're both bonus actions, but it just means that many more rounds with a flurry.
By the time he's at level 5 or 6, it's not so much of a big deal, because he'll have enough ki points to use one just about every turn without running low anyway.
That said, I'd tend to fall on the side of leaving the class alone unless you see an actual problem at the table. Rogues are more mobile and skillful, typically, but have to work to set up advantage to use their sneak attack, while monks move faster and have a lot of weird combat tricks, but have limited use out of a lot of their techniques. It doesn't seem unbalanced to me as written.