I would not be surprised if Thole is going in the exchange, it all depends.
While Thole would seemingly be on the outs and have no place here after this trade, they may consider that D'Amaud may not be ready to come North with the team out of spring training. Thus, they may keep Thole until they are sure Travis is ready to take over.
Ideally, I'd think you want Travis to be backed up by a veteran backup - at least until that draft pick out of Purdue, Kevin Plawecki, is ready to come up and be the backup.