I still think he should be moved. Once Tatum is back, I still see Pritchard going back to the bench and being offense off the bench. Also, if Simons keeps playing this well, he will likely be offered more then the Celtics could pay with the current NBA system.
My hope is a team that wants him past this year doesn't want to wait until the offseason to get him and tries to get him in house and can send the Celtics either the big man they need or the pieces needed to build a trade for a big man.
The better Simons plays, the less the Celtics need to send out extra pieces.