Psion
Adventurer
Pre WOTC, when SKR was still just a poster dueling with Rob Repp, the consensus from rec.games.frp.dnd that I remember was that the 2e MM was a prime example of how 2e was a dumbed down version of 1e and how it basically sucked because of all the padding a.k,a the fluff.
I thought that was mainly the loud rhetoric of a few (one I could name...)