It is interesting to note that according to usage stats, Kyuremu is UU. Not even high UU, lol. Poor thing. Maybe it will be BL.
Usage statistics are still not exactly reliable reasons for tiering at this point. The same usage statistics show that Deoxys-A, Manaphy, and Wobbuffet are also in UU - below Kyumeru, while Pokemon like Blastoise, Umbreon and Dusknoir are above them. (...)
And Ice is not such a terrible type with Dragon. It gives Kyumeru some cool resistance/neutrality combinations against against a wide variety of special attackers and it's not crappy offensively like the secondary typings of some of our other dragons are either (flying, psychic, dark...). A STAB Blizzard is very nice in Hail. Ice is a better typing for a dragon to have than Rock or Psychic at the very least.
I've used Kyumeru a bit and he's definitely not terrible as some people are making him out to be. He's not exactly amazing, but he's certainly not UU material. He can work well with LO or Specs as a hit and run Nuke, coming in easily with his natural bulk and nice resistances some people seem to ignore. Stealth Rock can be annoying of course, though it's not as common now for some reason.
I'm hoping the third version will bring Earth Power, Superpower, Calm Mind, Bulk Up, Icicle Drop, and especially Ice Shard to Kyumeru's movepool, and most of all that he will get Snow Warning through a stronger form (also Sp.def boost in Hail would be awesome). +10 to all base stats=720. Anyone?