I think the Berrios trade did 2 things for the negotiation. It solidified the "no really, if an offer from another team is good enough, it will happen" stance, which at least will give pause to a "holding out for more just because you can" stance.
But it also made the "sign to a big extension" budgeting easier. You can give Buxton a little more without having to factor in as much of Berrios deserves that too, and now he will expect it.
Anyway, i don't think anything will happen until the CBA stuff resolves itself.
Best get set for hibernation...