Yeah, have to be honest, bleeding them is all I have done. Kawi brakes need that often anyway. At least those of older models. Never new the science. Who knew. Not this dog. Curious what I might notice once I do with my old binders....I'm sure you do. Should flush/replace once a year at our level. It's a good winter service item.
Once a season? Why so often?You probably won't notice a ton unless your brakes are very mushy right now. It's a maintenance item though and can keep your brakes working better longer.
You should change your coolant once a season as well. Do most people? No.