There are plenty of MMOs which have tried implementing a similar concept to this, because the player character is supposed to be one of a multitude of generic adventurers. What ends up happening is that you end up doing all the grunt work, and then the 'real' hero shows up for a few seconds during the cutscenes to take all the credit. We could have gone down that route back in ARR had Alphi's Crystal Brave venture been successful and we were his designated sidekick.
