I think people fall in love with Sua-Filo's physicality, which is easy to do, and get amnesia about how bad he was in pass protection. Is he a better in-line run blocker than Connor? Unequivocally. He is, however, not nearly as nimble making him a minus player against the pass and laughably bad pulling and lead blocking.
I look forward to seeing what he can do and if he's an overall improvement, he'll yeah stay with him. I just one, don't think Williams has been as bad as many here throwing him to the wolves carry on and two, Sua-Filo isn't remotely as good as those same people paint him.
I do, however, think having Williams as a swing tackle could be a boon for the Cowboys given the nagging injuries Tyron has dealt with. That, in of itself, might make removing Connor from starting LG a more logical move.