It's been talked about before, but his bat has progressed at a pace that was probably detrimental to his future as a catcher. He's basically gotten 55-70 games at each level because until AAA his worst offensive performance was a 128 wRC, and as someone who was never known as a plus defensive guy, I can't imagine that's a pace that is going to optimize his defensive development.
Like, a little apples to oranges, but this is going to be his age 21 season and he's comfortably the starting AAA catcher, if not knocking on the door. At that point, Rutschman was playing rookie and A ball. Now, the counter point is someone like William Contreras got 382 minor league games starting at age 17 (like Ballesteros), which is only 31 more than Ballesteros has. But that might be an outlier (Willson got 517 games), and I think the everpresent concerns about Ballesteros behind the plate means him coming up at a pace that outstrips all these guys is a little ambitious.