Being in So. Cal., I don't have the heater concerns. A/C however is kind of important. I've been driving on Econ and have sometimes noticed the A/C not being as consistent of a good performer as I would like. I will see how it does on Normal and Sport.
So far, Sport seems good on A/C and on keeping the regenerative setting where I like. But it does seem to kick on the gas engine a lot more than what I get with the car in Econ mode. This week, I will focus on Normal mode and see if I can see much difference - I already know it won't keep the regenerative settings, but would be good to know about the A/C and tendency to switch to hybrid.