I like some of your ideas, and WH is my favourite thematic archetype and I've spent many seasons lately trying in vain to make a WH dominance deck work.

Unfortunately, it's really hampered by the fact it almost autoloses in several matchups.

However, a fundamental change that's needed to help this archetype and the first change needed to see how it effects everything IMO, *is how frost triggers.

Right now, if we have setup Frost on both rows and are down by 1 after the opponent passes, then we cannot pass and trigger damage. This is also particularly bad in short round 3's with only a few cards. Often you'll play a frost, but as there is only a turn or two left by the time you can, you never get the full trigger of value upon ending your final turn.

Also, its a complete copy and paste of the style of the SY ship card ... but Winter Queen should be summoned whenever Frost is on both rows and recieve a point balance to represent that. Also, I'd remove her Thrive ability which I dislike thematically and replace it with something else, even if its just something pretty nonsynergistic in general like Immunity. I just don't like the fact it is being thrown in with Thrive.

I like some of your basic ideas though of Frost overriding Dominance, that's quite a good start without going too crazy reimagining WH units for now.

Like I said, fix Frost itself, see how it balances, then narrow in on what's working and not working with WH specifically is my honest opinion.