Everything has pros and cons to it. Personally I like the simple air cooled engine. As for heat, even the shovels, pans etc all ran hotter than heck. Duh they are air cooled.
Try sitting above your liquid cooled engine in your car? The water temp might be around 190 give or take but that engine, exhaust etc is all HOT
Ive been the give me more power route and even had a 120 zippers in my 06 Ultra.
Im at a point now, give me a reliable running motor cause im out to enjoy the ride. If I want screamer I will buy a crotch rocket which was designed to go fast on the straights and curves