Its great that they buffed these characters, and its unfortunate that the existing gap is still there. Narrower, yes, but i still dont see any reason to use a Cryo character. But i expect that Snezhnaya will boost the value of all Cryo characters.

Also i think its a HUGE missed oppertunity of Genshin that Cryo characters arent immune to Sheer Cold (Dragon Spine effect) which i expect will also be present in Snezhnaya (calling it now!)