Windwalker as a spec needs three things in PvE to bring it up to par with other melee in terms of general value/utility aside from single target melee DPS. These are the same three things it has needed since beta, when I and other people who did extensive raid testing made posts along these lines.
1) Windwalker needs some kind of on-demand burst damage cooldown, or failing that, an execute. Presently the spec suffers from the same issue that plagued Enhancement Shaman throughout Cataclysm (since fixed for that spec, I should add), which is DPS that is too consistent from the start of the fight to the end, with no abilities that allow the player to tailor their damage to the needs of the encounter. There are numerous encounters in T14 and presumably future raid content where damage is especially valuable at a certain point in the fight, or where a particular phase has increased damage because of a buff or fight mechanic. Presently monks cannot contribute in these periods the way other classes can, though our sustained single target is fine. In addition to the balance issues that come with this, cooldown-oriented play has a higher skill cap and is generally more engaging. It's fun to feel like you have buttons you can press that significantly increase your damage output and to think about how to use them on a fight. It is not fun to know you do basically the same damage all the time regardless of what is going on in the fight or how you'd like to structure your output.
My suggestion would be to make Xuen baseline (either for WW only or for monks in general) and replace it as a level 90 talent with some sort of DPS cooldown (like the warrior level 90 talents for example). This could also make the very cool Xuen more of a signature class ability, since it would be permanantly available for the other specs. But any change which makes our damage more controllable would be great, and it could of course be accompanied with an equivalent nerf to sustained damage to stop overall WW DPS from being too high.
2) Windwalker needs to provide some sort of raid utility other than having strong personal defensive cooldowns. Other melee/tank hybrids usually have one or more defensive cooldowns they can use to help their raid (such as Devo Aura/Sac/BoP, Rallying Cry/Demo Banner, AMZ, HotW tranq etc), and some classes also provide offensive utility (Crit banner/Shattering, Stormlash etc). On top of those, you can throw in situational utility abilities like immunities, off-tanking capabilities, DBTS, Windwalk/Tremor/HTT, Death Grip/Gorefiend's Grasp etc. Of all the melee DPS specs, Windwalker provides by far the least to the raid in terms of general utility, and feels more like a rogue with only one DPS spec to choose from than a three-role hybrid that can contribute in other ways while providing solid DPS. We cannot off tank, we provide no defensive raid cooldown like other tank hybrids, we cannot off heal even in the most marginal sense, and we provide no offensive utility and have no situational utility abilities aside from our personal defensive cooldowns which are almost outrageously strong. On the right fight a Windwalker has two 90% DR cooldowns, a shield wall and a ~400k absorb/reflect, while providing no defensive or offensive utility for the raid. This balance is off.
3) Fists of Fury needs to be changed in some way. It is, quite simply, the worst rotational DPS ability in the game right now for any class or spec. It feels awful to use because it roots you in place, is high risk for low reward and makes the slightest movement of your kill target a huge frustration, it's buggy with haste scaling, the DPS increase it offers is incredibly small for the amount of attention it requires to use effectively, and it quite simply does not work on certain encounters because of the damage split mechanic. I cannot use Fists of Fury on Protectors of the Endless or Wind Lord because I can't make it hit the target I want to DPS for the normal amount since it splits damage to other targets, but I also can't use it to AoE because of the same mechanic. It is only useful if the target is completely stationary, I have several seconds in which I won't have to move and there's nothing else around to split the damage, and even then it's just not that fun to press your FoF button.
Make it single target, make it a burst damage CD, make it non-channelled, make it a utility ability for the stun or something, make it a cleave ability, or anything really. In its current form it is simply awful.
As an aside, we are also GCD capped which causes scaling issues (with both gear and things like heroism/bloodlust), and our set bonuses are probably the worst in the game. But those are cosmetic problems compared to the three issues above. Fixing those three things, without any increase in DPS, would make Windwalkers a lot more enjoyable to play and a lot more desirable in raid comps in high end raiding.
Edited by Gondlem on 11/15/2012 3:18 AM PST