Unless you started treating Raw on Thursdays as the flagship show where all the main storyline developments happened, and started treating Smackdown on Mondays as the subsidiary B-show where nothing much of note usually happens, then the only thing that would change is that your flagship show would now be taped (and thus the results of it would be made readily available over the internet by the time it aired) and your secondary show would be the live one happening the night after PPV's. And how do you sell a show that directly follows the events of a PPV as the lesser one? In other words, it would be a move that was both strange and dumb as hell.
Otherwise, other than the name of the show and its branded color, people are still gonna be conditioned to think Mondays is the premier night for wrestling and I don't ever see WWE trying to change that perception, so Smackdown would simply become the more important show than Raw from now on.