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1)Distribute the GOOD ice-type moves to proper mons, every ice-type special attacker should have freeze dry while physical ice-types should have both ice punch and icicle crash (why the fuck does kyurem black doesn't have ice punch at the very least is still bothersome)
2)More resistences wouldn't hurt but let's face reality, weakness to fighting, steel and rock which are extremely common is going to remain a problem, no matter the perspective. That being said, avalugg having more resistences would be nice, the defensive ice types could be better if they could circumvent their slow speed, have GOOD abilities and could stand a chance.
3)Give articuno his old BST or give it Magic Guard for fuck's sake. A lot of mons that are weak to stealth rock, specially the ones with 4x weakness to them deserve Magic Guard or Magic Bounce.