I think it has been a great season for Sam.
I further think that s12-15 have been great for Sam, since Regarding Dean when, IMO, Dabb(for all intensive purposes) completely killed off the complex character who was Dean Winchester and that was previously written, more often than not, in all of those previous seasons, and replaced him with a Dean Winchester who was narrowly, strictly, and only written to prop and pimp ALL the other characters on the show now(and instead of JUST Sam) when he wasn't being written as strictly and only the comic relief.
And I think it's for this reason, more than any other, that the show is ending now, at least two seasons before the network hoped it would end.
And I wholeheartedly applaud whoever first put that thought into words and I think it's easy to guess who that was, ESPECIALLY given the no-holds-barred, utter ugliness and pettiness that almost the entire writing room is showing not just the Dean character but, IMO, the actor who portrays him also.
At this point, the finale being more Dean-positive is just a pipe dream, IMO.
I would take it completely as his due, if that's what happens, again, especially after the treatment he's received for the past 4 seasons, but I can in no way expect it or hope for it from this set of writers.
No way. Not at this point.