From the few tidbits i heard about the ES mmo it's going to diverge from the traditional ES systems and follow in the "the usual" hotbar/turn-based combat system, and making it not so open-world explore-at-your-own-pace. which turns me off of the idea.
though i haven't been keeping up with the info and have only read from around the time it was first announced, so there might be better info out now.