in theory, it might be possible to remove the existing minolta mount and modify the lens to mount on another camera while meeting the other system spec for flange-to-film distance. I am pretty skeptical that one can add an adapter without additional optical correction to maintain infinity focus with a Rokkor lens on an EOS body.

You are correct about the quality of Minolta optics however. Minolta didn't have as diverse a set of offerings compared to its competitors, but optical quality was never a reason to shun Minolta cameras.