If you go back and actually look at the context of that post that you've cherry-picked out from about a month ago (I didn't know that PLDs could raise dead this expansion), it's not an unreasonable point.

Viewed in isolation, Dark Mind is probably a bit too strong. But that's also a reflection of the fact that tank mitigation, on the whole, is much too strong. I think that even if every tank was limited to Rampart, a 30%/120s cooldown, a 5+ min recast invincibility move, and Sheltron/IB/TBN, you'd still power through most of the encounters we've seen designed this expansion.

Right now, tanks are simplified melee dps who pop mitigation cooldowns on a set, fight-specific rotation. The devs, in their infinite wisdom, seem to think that we do too much dps. So if you take that element away, at least the mitigation end of things needs to be more challenging.

I think that the entire suite of tank defensive abilities needs to be re-evaluated. Dark Mind should be removed. So, too, should Thrill of Battle and Raw Intuition, with Holmgang increased to at least a 5 minute recast. Inner Beast should be stance independent so that you actually have to use it to clear content. Sentinel should be dropped down to a 2 minute recast. Cover should be merged with Intervention and incorporated into the underutilised PLD gauge system. Bulwark should be a traited form of Anticipation.

So yeah, Dark Mind is a problem, but it's also part of a much, much bigger problem across all tanks.

As for lifesteal - well, probably the number one thing that people have been asking for is a clear cut identity for jobs like DRK, WHM, and MCH. I'm fully behind the idea of making DRK into a lifesteal-themed tank. WAR can go do something else, as far as I'm concerned, unless they want to give up having the best burst dps and the best burst enmity as their schtick. You can't be everything at once.