I had fi for a while. I could deal with the limited coverage but the trouble I had was that it would often say I had service when I didn't.

Nice data! Ours is 1200 Sq ft house with 18,000 BTU centrally ducted. We are having similar results as you (and have discovered today that the relay on the in-unit electric resistance coil is broken).

Keeping up ok but definitely drooping.

Totally fair. I wasn't upset to see them, but I could see how that behavior, even just occasionally, would bother folks

This is definitely not true. I didn't really have a problem with those dogs, but if you sat down to eat a snack up at the top they would sit right down next to you and breath very smelly dog breath in your face while hopefully waiting for a snack. You move, they move. Certainly not aggressive or violent but they did approach people minding their own business

If you're driving somewhere in snow that makes you think you'll need awd, then you definitely need snow tires. AWD/4WD helps you go, but it's the tires that help you stop. And stopping is more important than going, all things considered