IMO

OP is somewhat correct. SE should actually address the loot diversity. It's bad enough as it is.

One of my annoyances is that say you for whatever reason get a party of nothing but melee and certain things are shared, you've got to compete with 4 rolls, and the drops are so sparse.

Another thing SE should consider is the system Diablo 3 now uses "Smart Loot" and only allow loot drops for the classes actually present to use, and make a toggle for the party leader to change loot rules thusly for Farm parties versus Progression parties.

I shudder to think about the loot for Casters when new caster classes are added and they use INT.

I disagree with the pre hysteria though, we've no idea what Ninja will really use.