>>14013586It has good typing, a useful ability, and I imagine it'd have decent stats (esp. since GF seems to be better at making stat distributions, as gen 5 shows).
If it gets Shadow Sneak like I'm hoping it will, it'll very likely be UU, and will become my favorite Shadow Sneaker (currently it's Dusknoir for a lack of better STAB users).
I'm not sure if it'll have Willowisp or Hypnosis, but it'll definitely be able to run bulkier defensive sets if it does, not unlike Froslass before it was banned.
As with every new generation, there's a lot to look forward to in new moves, so the possibilities are vast indeed. From what we do know, however, it does seem like it'd be fairly competent in competitive play, even if not OU tier (from what's been released so far).