You typed all this for what reason? They still are not significantly better than they were at the end of the season. Games against Buffalo or any other team for that matter, last season still have no bearing on your original statement, that is a fact.
Does it improve their chances next year, maybe, but we still have the rest of FA and the draft to get through before that question can be answered. The Dolphins only have a 2nd, 3rd, 6th and 7th for draft picks this year.