BioWare should have evaluated their own system, and actually attempted to factor in their smaller raid sizes, instead of just copying WoW. But then, there's a lot of things BioWare should have done instead of just copying WoW.
Agree with what you wrote.
I think BW copies a lot of WoW stuff because it works. Not well in many cases, but it does work. Too many MMO's (STO, Warhammer, RIFT) have tried gimmicky solutions to the problem that only cause more issues or fix some to exacerbate others.
I think as time goes on, however, the sheer rage of those affected by what the OP is talking about will necessitate them relooking at this.