I think a celsius and frozen cure and immunity alone would make it see use, although I think the ideas for bonuses might be a little overtuned. I also think an ice tile consuming heal might be a bit much, verglas kit is already pretty spectacular and rounded and the only thing they don't really have is a baked in heal. Even if they can access healing through meditate and aid anyway, I think those added immunities plus a heal might be a little much unless it was quite a small one, 2 or 3 * ice tiles consumed in 4 range hp or something maybe.
Even so, I think that verglas removing ice tiles is super counter productive to everything about them, mechanically and thematically.
Even so, I think that verglas removing ice tiles is super counter productive to everything about them, mechanically and thematically.