Cody Whitehair wasn't bad at Center. He made the all rookie team and the pro bowl in 4 seasons at a position he never played in college. In any case, I think he'll be better at guard. I think it's more natural for him.
The issue with playing center are the line calls. I think that's one of the reasons why the line seemed to play better with Sam Mustipher towards the end of last season. It may be the reason why James Daniels is playing guard instead of center.
This is the defining year of whether Pace can build an offensive line. Out of the 5 positions, only one is solid with Cody Whitehair at guard. Sam Mustipher may have the center position by default, as there really isn't any competition. But, he'll need to build on last season as center is an important position. The other guard spot will be between James Daniels, Alex Bars, and Elijah Wilkinson. Germain Ifedi has the most experience, and he'll need to ward off Larry Borom at RT. I don't know who will challenge Teven Jenkins at LT, but it's quite an expectation for a rookie to play a position that he hardly played in college, and an important one at that. And regardless of who wins the competition, it ain't worth squat if they can't protect against the top pass rushers in the league and open up running lanes against the best front 7s.
If this all falls into place, Pace will have done something that hadn't been done in decades: build an effective offensive line through the draft. If not, it's the same old, same old.