To clarify, I'm writing up a homebrew version of D&D. I'm using 3.5/Pathfinder as the base, but starting with an "opt-in" sensibility. I.e., nothing's "in" until I add it. I want to keep it simple and streamlined, like BECMI. I'm doing away with all classes except Fighter, Rogue, Priest, and Magic-User. They're like the 3.5/PF classes, except Priest is now a pure divine spellcasting class, all combat abilities removed, with improved casting to compensate. That's to make the multiclassing more straightforward, because multiclassing is how you make a classic Ranger (fighter + rogue + priest/MU), classic Paladin (fighter + priest), classic Bard (MU + fighter + rogue), and other character concepts.
So, a "pure" Bard (Bard w/o fighter or rogue abilities) in this system is basically a tweaked MU.
I'll have to go back and look at Bardic Performance. I'm not that familiar with 3e/PF, so I'm sort of learning as I go.