RIP Ninja

[Nalien]

And in any other content it's nothing 2-3 seconds of watching your aggro and auto attacking can't fix.

That's the appeal of it though. Rather than literally doing nothing for a few seconds and halting your DPS, you can continue pushing DPS to the limit with zero repercussions as far as enmity goes, if anything you're helping the tank by zerging from the word go. For 24 man content this will be a very nice addition, generally not statics there and things can get a bit crazy with the number of adds.

I can even actually see it being fairly useful for grouped content as well. Rather than waiting for the tank to establish hate on an add (which they may have to pull from afar) I can just rush it from the word go and slap my hate onto the tank. One tank strats become much cleaner as well. Been doing a lot of pony farming lately, with DPS tanking one of Garuda's sisters, since none of them have any enmity combos that can get a bit hectic and she can bounce around a bit. Nothing world breaking, but with this I could easily make one DPS the OT and make things much smoother.

This skill will be far from useless. Sneak Attack is useless (or at least it will be when they finally go back and adjust Demon Wall to be the same as all other similar type mobs they've released since). All Fours is useless. This has its place. I'm going to laugh so hard when changes in Heavensward actually result in tanks having a harder time with enmity. Heck, if they balance the stance dancing and new DPS output accordingly this could be an invaluable tool which lets a MT stay in DPS stance for longer, meaning overall higher DPS. This is basically a "Hey tank, don't worry about your enmity just yet and stay in Sword Oath/Deliverance/Darkside for a bit longer" skill when it comes to serious endgame, far from useless there.