Watching the games, I would describe Devers this year as a very good defensive 3B. His play this year in no way suggests that getting him off 3B is any kind of priority. At this point, it ain't broke. 3B defense is not, in my opinion, something that needs to be fixed right now. If he continues as he has this year, it won't be a problem for several years yet.
*Note: I am substantially skeptical about advanced defensive metrics. I understand that some metrics grade Devers' defense as bad this year. Having watched the games, I would cordially agree to disagree.