He’s been much too good with the bat to send down. Yeah, he’s in a slump right now, but sending down your current clean up hitter?
If he has to learn to play 1st, then it’s going to be is Boston, and you live with the defensive ups and downs that that entails.
I think they’ve finally decided to leave him at second instead of bouncing him around. I’d leave him there and figure something else out.