I like exclusives.
I mean, if I buy buy 6 levels of Barbarian (greater rage), 40 levels of Pretend-Rogue (+20d6 SA), and or replace classes (SA>SS/Skirmish, specific weapon>Spellthief) they why not play something else and just buy into it? Each class needs something to stand apart from the rest. Ranger, Paladin, Duskblade, and Hexblade are fictionally poor and work better as a PrC for a primary spellcaster. Their key traits, are not only buy able - Favored Enemy (buyable), Smite Evil (loads of PrCs offer it), Hexcurse (feats are better) and Spell Channeling (see name?) - but their whole concept is full caster + something else = loss of spells + other stuff. It's exactly what PrCs are designed to begin with, not base classes.
Generic ClassesUA are flavorless no concentration be everything classes. BUT! They did something right by printing class abilities as feats. You have a guide to knocking some classes out and using feats to replace them. Now a Cleric/Ordained Champion isn't trumping on the Paladin, there is no Paladin, "paladin" is a term for a melee centered Cleric as "gish" is to arcanes. "Mundanes" are people who avoid the really supernatural traits, like the Fighter burning feats on Furry, Evasion, Favored Enemy, and the Rogue burns feats on a stacking Death Attack for higher DCs or w/e. Yeah, the Assassin PrC can be deleted too.