DM ruled that switching abilities for those available at the same level wasn't "becoming more powerful." So, I used it on simulacra of my int-based monk15/wiz/abjchamp/swordsage to customize their skill point loadout and feats. Since it was an epic level campaign without xp (5gp/1xp conversion for things requiring xp), eventually I had a small army of simulacra working for me. And, since eventually we went into a d20 modern-type thing, I kitted most of them out with stealth capabilities and sniper rifles and used them as a long-range suppression team. We were all linked via interplanar telepathic bond. Pretty awesome.