Yes to more temp and weather amplitude in the game. Including introducing some seasonality in Siptah with the possibility for rain and snow and extreme cold and heat. I play a lot more in Siptah than in the EL. The lack of any weather change between different part of the isle is boring.
For armors, before they were made temp neutral someone here had suggested to use the padding for the temp protection. So each kind of padding and perfected padding will be crafatble heat or cold protection. The quality of the padding giving how much protection the armor has. And the thralls can add some bonus like they do for the armor protection against damage.
I don’t know how complicated it’ll be to implement it. Maybe it should be to explain why it wasn’t done when armor were changed.