if a bat's just way ahead of a glove, teams often make switches because it's important to challenge thy hitters. this happens more with shortstops, but has also happened for quite a few catchers
Reds moved Eric Davis and Reggie Sanders off of shortstop at around age 20, and Joey Votto away from catcher at around, what, 22?
FWIW, since Thumbs doesn't have stellar hitting numbers, I think that he'll stay at catcher in hopes that he figures it out. Learning to catch takes a long time, though.