I use the merino 210 glove. Its light and my hands still freeze. It’s ok they are just going to have to freeze. Bulky gloves don’t all trigger feel etc. I hunt down to single digits.
It's hard to beat merino wool. My favorite base layers are that.
I can see your point though.
Just a thought, if you go one size up and get a flip top mitten, or have a wife handy with a needle and thread, I think heavy boot socks might work with the right cut .
Use what you have and when you see something worth shooting, the same hand flips the finger top out of the way.