I have no idea what Mac thinks or wants. If I had to guess, I would say his guiding principal is the qb that gives him the best chance to win. If that means changing QBs then, yes, he would want to change QBs. LDR set the bar really low for another QB to show that he gives the gators a better chance to win. If neither Franks nor Trask can clear that bar, then LDR will start. I don't think that is likely given LDR's known limitations, especially under Mac's scheme, and the fact that he will be out for all of spring giving Kyleipe a chance to show they are better.
Why do you think he will stick with LDR regardless of whether he's the best option?
By the way, Mac didn't stick with Fred Johnson at right tackle, or either of the two centers replaced by McCoy after they came back from injury. He didn't stick with whoever was replaced by Cleveland (Fulwood? - I don'r remember). He didn't stick with Cronk as the lead back after the first year either. I just don't buy the "he's stubborn" argument.