Why not just make everyone a DPS?

[RapBreon]

Not really. PvP is the opposite end of the spectrum but there's a lot inbetween. For example classes can be done with more a priority system than a fixed rotation. A priority system isn't mind blowing by any means but makes things feel just a little less scripted. Bosses can just add little bits of rng to the fight, not to the degree you're winning or losing fights on rng, but enough that it makes it feel like maybe the boss is thinking a little bit about what it's doing.

Priority systems become just as drab as rotations in the same amount of time - at least to me. Most of WoW's classes work on a priority system rather than strict rotations...and they have literally the most boring classes in the world to play right now. Think Ret Pally *shiver*. I thought BRDs and MCHs have priority systems anyway? So there are options.

Bosses do randomly target, which you do need to react too (within set parameters). Imagine if the Oppressors cast their abilities in random orders 0.o. So many wipes to RnGesus. So many free-kills because he liked the look of his Photon Spaser this time. That would be insanely frustrating. This game is all about pattern recognition, more so than even other MMOs, it's designed that way from the ground up. So messing with the carefully crafted pattern in this game would be pure unmitigated bedlam.

Most of what I'm gathering here is that you just don't like the game's philosophy/design...which is dandy, you're just not overly thrilled by the concepts, but calling it 'bad design' is a bit unfair. Because I think it's pretty good for what it's trying to be.