Tanking has been a pretty rocky experience across the board, from what I'm reading here and on Reddit, and from my own experience as a WAR, too.
The sneakiest nerf SE dealt all of us was removing VIT from our attack power, making us purely STR based.... While also locking us out of wearing any new STR accessories.
What are the implications?
Lower enmity generation due to lower damage.
As everyone else's stats/iLvl/Damage increase, Tanks are going to plateau and be massively weaker than the DPS we are meant to hold aggro from, making this harder and our job less rewarding to play.
Even with full Strength VI melds on our right side, that is a static number that will not go up the same way other roles are going to have stat and attack power increases. We'll always be held beneath DPS, rather than on equal footing. I'm not referring to doing the same kind of DPS as a DPS class--I'm referring to being at a similar level of damage proportional to theirs, so that there isn't a massive disparity in damage that causes problems for the entire party.
It's not fun.
This is more important than people give credit for. We play this game to have fun and enjoy ourselves. When it becomes frustrating and stops being fun, what's the point? Being locked into a single stance, and perhaps even a single combo with only a few cooldowns is not fun at all. We have multiple stances and a wide toolkit that's meant to be used, but if we're shoehorned into only doing our enmity combo, it becomes boring and even at times frustrating when dealing with particularly potent DPS.
Just give us VIT back, even if it's at a lower weight than it was in Heavensward. Put us back on equal footing with the rest of our party--leaving us perpetually a cut below feels punitive and it takes the joy out of Tanking and puts more stress on the DPS to manage their aggro (Most won't do it anyway, which puts that stress right back on Tanks).
I thought SE wanted more tanks, not less.
Some comparison of attack power with VIT accessories (Ilvl306 total), vs my old 270 Slaying Accessories.
STR:
VIT:
Conclusion: Wtf.