I agree. 6x6.5M is about what I am thinking would be a good deal for both parties if he signed that deal today. Been saying since last season that my concern is that Jake will bet on himself and put up his best numbers yet next season, increasing his value to $7M+. Would be grand if the Bs could get him locked up sooner rather than later. Jake, who does have some injury concerns, gets a good contract providing security and the Bs are able to keep an important talented component of the team. Win/win.
Your point about being fully developed is important. It makes no sense to develop a top line player such as a Jake only to move him once he starts entering his peak. Those are the players you cherish and do what you can to keep.
I get the sense that there are more than a few fans who do not fully understand Jake's importance to the team moving forward. He has a skillset that is unique on the Bs, so it's not like he is some kind of costly redundant luxury. Core as far as I am concerned, and I will be very disappointed if he decides to leave/Bs don't do what it takes within reason to re-sign him.