One part of me wants Romo to lead the Cowboys to a playoff run and possibly a SB, but the flip side of me loves what Dak has done so far and wants to keep him in so he can get real game experience and grow as a QB. If the Cowboys are 5-1 when Romo returns I would ask Romo to be the mentor to Dak but to be ready should anything happen. If the offense is in a good rhythm and is winning games for us, there is no reason (other than a compassion for Romo) to sit Dak. I have always been a firm believer in "if it's not broke, don't fix it" and right now, the offense isn't broke. Zeke's issues aside, this offense has been able to move the ball and put up points. They improved in the redzone this past week, and I believe they will only get better.
I have been a big Romo supporter for years, but like all good things, it has to come to an end. Why not let Romo (who loves this franchise) educate the future QB on the nuances of the game and leave the team in great hands when he finally retires? If Romo is truly a team player, and this offense is operating like a well-oiled machine, he would tell Garrett and Jerruh that he would do more harm than good by coming in and changing the way the offense operates
Now, if the Cowboys are 5-1 (or worse) and the offense is struggling because of Dak then yes, absolutely put Romo in and provide this team a little change of pace. As of right now, I would leave Dak as QB1 until he proves me otherwise.