It's too early to say in my opinion. I see some things that stink of "business as usual" and some good signs as well. Every change since the Donahoe era has been put up as a new guiding light though none have turned out as that.
With respect to Colin Brown, while cutting him is certainly no big loss, it reminds me of the Trent Edwards situation and Gailey cutting the string after a few games. Let's face it: Brown sucked last year in his few spots. So, yes, it is concerning that the real football people with the Bills continue to seem to be blind about self-evaluation and the organization be reluctant to spend their cap money to win now instead of promising rainbows and leprechauns a few years away. It is good to be able to admit mistakes and turn the page, no question. Still, building your team in October is definitely NOT a plan for success. And, while many Bills fans are highly tolerant of the "it's going to take time" mantra, it's not hard to find other teams that turn things around very quickly. The Bills are the statistical outlier of losing in the NFL.