Like, what kind of fight would you want to stack windwalkers on?
I'll do this for rogue, though I'll miss stuff:
->If the fight has a sustained flurry phase, a rogue going combat can bring the beat down.
->If the fight has a sustained aoe phase, a rogue going mutilate can stack up the poisons.
->If the fight has an execute, a mutilate rogue can really hurt.
->If the fight is sustained and melee friendly, a rogue will probably be your best bet by a narrow amount over other melee, and presumably over everyone else.
->If the fight has a lot of aoe damage, a rogue can mitigate a lot of it.
->Great "sustained burst"-> damage over about 10->30 seconds, with low cooldowns.
->You can't do much from range.
->Multiple target fights where the targets are far apart, the rogue is not so great.
->You change target poorly.
->Poor burst damage over the course of a couple seconds.
->No seriously amazing long cooldowns with massive effects.
->Poor burst aoe, and some specs lack aoe entirely.
The first two weaknesses are true of melee in general. The last point will be different in mop.
I could do a similar thing for dps DKs, or ret, or warriors, or cats- even enhancement. Obviously, all these hybrids have an advantage of being able to be brought for entirely different reasons besides being dps, but this isn't about that- the simple fact is, if your boss pulses damage, that will help warriors by giving them free resource (not in mop), if you need to zip around, that helps warriors, if you can absorb stuff with AMS that will help DKs, if there's a great spell to copy, that will help DKs, if there's something like an elementium bolt that a DK can wipe out with like three obliterates, that is a fight where you want that to happen, etc.
So, what will monks be GOOD at? When will you say, gosh, I wish we had another windwalker here?
And what will monks be BAD at? When will a monk player wish he had some rogue tricks, or warrior tricks, or ret ability?
I'm not on the beta, I honestly don't know. What's the pluses and minuses to the dps spec?