...aaand how exactly would that change how Steel Beasts works already?
If your argument is that the loader is a spare guy that can fill any of the roles that are already in SB Pro...?!?
If you lose a commander in Steel Beasts, as a human player you can still occupy the commander's position. But then we reduce the loading speed. Lose loader and gunner, you can still shoot the gun once a minute or so. Not that it was a good idea, but... you could. Lose three guys, and you can still drive away the tank and hope for an ambulance to show up. With remarks like this, I'm wondering how familiar you are with Steel Beasts at all.