I use only the BC.

Those who say that there are two things to manipulate aren't being quite straight. The second (suit) is only "manipulated" on decent, and only when the squeeze gets uncomfortable. A quick shot of gas is it.

On ASCENT, the suit dumps itself (you dive with the dump wide open); there is nothing to attend to on the way up other than the BC as usual.

If you're too cold, put on another layer of underwear.