I feel like as long as its got mildly competent Speed and decent coverage (a lot of dragons get Thunderbolt), its probably gonna be good enough for at least UU
The "problem" with Ice is just that its a very offensively-oriented type, imo it having a lot of weakness with few resistances isn't really an issue itself, its meant to be a glass cannon type. Its just that GameFreak has to stop making slow defensive Ices (Which, for what its worth, I feel we got a lot more "Slow, but meant to use TR" ice mons lately than "Slow defensive Ice Mon". Can't say we've completely shifted from that because dumbass frosmoth exists as a weird support mon, but other than that, I feel like every Ice mon since Gen 7 either has a good base speed
, has a way of boosting Speed
or is meant to use Trick Room
. Even Cetitan fits into this - Regardless of its Base speed, its confirmed that it has Slush Rush. I feel the only outliers of this are the forementioned Frosmoth, mr Rime being at an awkward 70 base (i guess it can technically raise speed with Rapid Spin? does that even count???) and Havalugg, althop the latter could arguably be a TR mon for doubles, not sure)
I can kinda see this mon being inteded as initially mid Speed but high HP so it can set up DD and go ham - Worst case scenario it'd probably still have Scale Shot. Sure that Ice/Dragon isn't exactly an outstanding offensive combo but Ice STAB itself already goes a decent mile imo and as I said earlier, Dragon tends to have coverage moves that would really help it out (Namely a lot of them also getting Equake - would be really good here to deal with Pex). Whatever the case, I really doubt that this mon would end up lower tier, even if it doesn't exactly end up as an OU-Defining beast.