Who should start at QB for the Pittsburgh Steelers in Week 7 game vs. Miami Dolphins?

The Pittsburgh Steelers have a quarterback problem.
Is it a good problem? Well, that remains to be seen. Pittsburgh was struggling Sunday to keep pace with the Tampa Bay Buccaneers due to a floundering Steelers offense.
But when quarterback Kenny Pickett went down with a concussion, Mitch Trubisky came in and changed everything.
Trubisky entered the game and played with energy and intensity he didn’t show in his four starts this season. He led the team down the field and scored what was ultimately the winning touchdown.
Do you see where the problem is? Trubisky was benched in favor of Pickett but far outplayed him Sunday. Now, Pickett is in concussion protocol and his status for Sunday’s game is up in the air.
But even if Pickett is cleared, should head coach Mike Tomlin stick with the hot hand or go back to the rookie?