EzekielRaiden
Follower of the Way
So, in other words, the power imbalance doesn't exist because players can do things...that any player can and should do...and because the DM can play favorites to ensure that the pesky rules don't actually achieve anything.So, your solution is to make fighters equally annoying.
It factors into the "I feel like a sidekick" complaint. No changes to game mechanics are going to change that, it's a player issue*, not a mechanics issue.
*And a DM issue, a good DM should do more to make all players feel equally significant.
Great solution!