From what I've heard so far, the first episode wasn't all that bad. Apparently it does a decent job of capturing the feel of the series without overcomplicating anything. I'll have to watch it myself when it gets subbed in order to post my actual opinion of it, but I'm a little more hopeful now than I was before.
Oh sweet. Hopefully we get to see some of the other more obscure Japanese X-men characters like Sunfire, Lady Deathstrike, or Silver Samurai. Especially if Sunfire gets turned into one of the Horsemen, because that would lead to Gambit becoming the Horseman of Death (assuming gambit is in this). =D And, obviously, Mr. Sinister and Apocalypse.