How likely are they to draft a QB who will be suited to the offense they're going to try to run with Cam under center?
Why spend another year trying to acclimate your players to a system designed for Cam Newton if that's not how your team is going to play when Cam is not the QB anymore?
They don't have a static offense. They adapt and evolve. Always have. Some more successful than others but its never been a set system.
Hell, they probably had at least 4 distinct, different offenses just when Brady was QB.
How many offenses can you run with a QB who can't complete short to medium throws with any consistency?
Adapting is fine and good. But here's the problem:
1. The Patriots need to restock their talent.
2. The best way to do that is via the draft.
3. Young players need consistency in order to acclimate to the NFL.
4. In order to provide consistency you can't be changing your system / basic gameplan frequently.
5. Therefore, they need to have a solid foundation / framework in which to bring along young players.
6. It doesn't make sense to invest time and resources into building a foundation / infrastructure that's premised on Cam Newton's limitations.