I think they lost the ability to get enough of the same quality chevre when they went to more mass production. I think they lost the same attention to detail that comes from smaller workplaces. And I think they have altered or added finishes to the bags to make them more durable or something. I preferred the old way, even if the color didn't remain perfect forever or if the bags were a little fragile. Of course, not every bag then was exactly the same or perfect. But I think there was a certain consistency of the leather living up to expectation and being what made B bags distinctive. I generally found that to be true up to fall 2005. Some bags different from the usual started appearing. Many were still excellent.
I don't hate all the new bags. I just accept them for what they are to me - a different thing. It all seemed more acceptable while the prices stayed the same for many years. It was nice to be able to buy a bag at retail without hours of effort. It starts to bother me more as the prices keep going up so much. Of course, I'd pay a lot for the old leather.