I think the fight looks cool, but from what we saw in the video I wouldn't necessarily say it is hard or will definitely be a good encounter. I mean WoW has environmental obstacles too and I wouldn't call their raid encounters hard or interesting.
I'm hoping that incapacitation plays a role in the Ifrit fight either needed to disable a powerful attack Ifrit has, or to get a better chance at a certain drop (moving drops to a treasure chest in Darkhold was a cheap move to avoid making incapacitation worth it).
Without Battle Regimens I'm hoping there is much more to these encounters requiring a group effort, or at least that what obstacles they do contain aren't as easily bypassed as Ogre and Batraal's or the lifespan of interest in these fights may not last as long.