From my prospective it would be a disaster!!!
I'd almost bet my house on the fact that all the weeks I could make it would be snooring carp rounds and thus I'd simply stay away as the drivers I'd want to race against would be concentrating on that not GT12.
Leave it as is, let people make the choice what to run. I've no vested interest as at best I could probably do 3 weeks in a 5 week month so no chance of featuring in the championship either way .... not even if I TQ and win every week, which of course I intend to do