Fewer physical buttons doesn't make the interface less confusing. If a button does 5 different things, it becomes more confusing, because a given button is real

Fewer physical buttons doesn't make the interface less confusing. If a button does 5 different things, it becomes more confusing, because a given button is really 5 actions that you have to understand when they apply before using that button. Consider dedicated picture-in-picture controls as opposed to trying to reuse other buttons to do something different to control PiP. If you aren't using it, you just tune those buttons out. If you are, it's easier to use.