2. This assumption that he will need to be changed in any way is predicated on nothing. Why would he need to be changed?
I think the main problem with Minsc as an Origin character is that it looks like the central plot involves offering the MC a choice between using the tadpole powers to become an Evil Power in the world, or else fight it and be a good guy.
That just doesn't line up with Minsc's nature as an established character in the FR lore. He would never take the Evil option.
I'm normally in favor of player agency, and playing "Evil Minsc" might be fun, but in a case like this with a pre-established personality I think it breaks immersion to even have that option with someone like Minsc. It looks like there will be plenty of other ways to play an Evil MC in this game without drawing Minsc into it.
