I worry about a Terry Rozier situation.
Rozier gets to play big time minutes with the Kyrie/Hayward injuries in '18, even leads the team in playoff minutes. Then gets moved down to 8th-9th in the rotation the next year and part of a disgruntled roster with their eyes on the door. Similar situation with Reggie Jackson in OKC, stepping up when Westbrook goes out, then pushed back down when Westbrook returns.
I worry about Pritchard excelling with Brogdon out, only to get squeezed out of the rotation once Brogdon comes back, and not really being happy about it and it impacting team chemistry. Sure if it's just Pritchard alone who's unhappy, you're 3rd string PG pining for 2nd string isn't enough to derail things, but it could be one of multiple things (maybe Porzingis/Brown not happy about losing shots to the other, Porzingis/Horford/Time Lord not happy about losing minutes to each other, Brogdon/White unhappy about not starting, Brogdon unhappy about trade rumors, etc.).
If Pritchard plays well with Brodgon out, ideal situation might be to flip him at the trade deadline for something after he's built up his stock. Though with Brogdon's injury history, I wouldn't mind keeping Pritchard as insurance for a '24 title run, even if it means losing Pritchard for nothing (only ok with that if team wins it all).