Quote Originally Posted by Oracle_Hunter View Post
This becomes awkward with multiclassing.

It was already awkward in 2E ("My Fighter/Wizard/Cleric can wear armor to cast cleric spells, but not wizard spells, and has to use blunt weapons.") and 3E-style multiclassing will only make it worse. It will probably be better to follow the 4e route of leaving fluff decisions up to the DMs and keeping the rules as "mechanical" as possible.
I like 2nd edition multiclassing more than leveling up and ordering your class level from a menu as found in later editions. The confusion of what class aspects are compatible could be allievated rather easily with a helpful matrix. Restrictions are part of class balance and multiclassing should have a bit of a challenge to it, because if it was easy, everyone would do it.