I know you can select anytime before hand where your commander will end up "before hand," but this is flawed. Where I may want mu commander to go depends greatly on what my opponent does if they kill, exile, bounce it, etc. this setup can also cause many dumb mistakes, like killing your commander with your own Thasa.

Can it be switched so that when you commander leaves the battlefield, you are then prompted to select where it goes? Like in real life? This would eliminate mistakes and allow reaction to your opponent play