WarKirby
Arty person
Funny. I use them solely for moar powah. The original intention was probably to even out the odds for builders whose units are not 100+ xp monsters. I like to kill stuff to make moar uber unit(s) to kill even moar stuff even easier. And then I equip my strongest units with the best available gear. And then I butcher the enemy.
I agree.
I was generally under the impression that they're just there to add more depth and fun to the game, which is a goal they certainly achieve.
If they're intended to balance builders, I'd say they don't do that too well, but I still love them. Master equipment is one of my favourite FF features.