DK can go to MSU or wherever for a few years and can come back once DR goes pro. Then again, he was already being recruited over with Rhule going after Manske and other QBs in 2025. Let's be honest, he's overreacting over nothing and if he's afraid to compete against DR, he's going to struggle wherever he goes with this "poor me" attitude.
On the positive side if he stayed, maybe he could befriend DR and get to work with his private QB coach during the offseason and refine his skills.