Brand new cylinder head, drives as normal so far, no unusually high cylinder temps either, and I’m still driving with summer tires and it’s below 30F. Swapping winter set on tomorrow. I’m incredibly happy right now.
So the gist of what happened was they found coolant leaking into cylinder (wet with coolant), and the cause couldn’t be located, so the cylinder head and gasket were replaced. And my awesome service adviser told me to text him if anything changes over the weekend.
Now I only have to survive until tomorrow morning!