Most of my concern is the in-between, like what do you even do once you go to change out of your equipment on a freezing cold day?! Do you just throw a towel over your car seat and just stay suited?
That is where the Surf Fur poncho comes in, you can wear it over a wetsuit between dives to keep you warm. And use it to change out of your wetsuit after a dive.
And the best thing you can do to warm up after a dive is to take the wetsuit off and get dry. A wetsuit only works under the water, above the water it acts like sweat and cools you down further. The Surf Fur counters this somewhat by stopping the wind from causing surface evaporation of the water on your wetsuit, but it isn't 100%.