Since he still has 2 years on his deal, I think we'll keep him for both years at the very least - especially for next offseason when we can spend more liberally in FA to address OL/WR. I love how much of a team player he has become, how he's embraced our community and fanbase, and expressed his desire for a championship here.
I'm thinking if Allen proves himself as franchise QB material sooner than later, an upward trajectory of this team would make him willing to sign an extension with us, but if we're going to be in a transitional phase, he'll walk as FA and there will be lots of gratitude on both ends for his time here.