Aside from the Master Gi bug, though, the other things don't seem too bad. Slowing XP generation is probably for the best because there IS no "end game." There are some raid bosses to kill, but if you know the strategy, they're easy. Most of them can even be solo'd if you're willing to cheese them. The raid bosses are the same every time, too, and there aren't really all that many of them. Once you've spent five or six hours killing them, you're pretty much done. You can keep killing them to collect new gear, but there's nothing harder to use that gear on. And as for nerfing the gear. . .again, there's no higher level content to be had, so it doesn't really matter how strong the gear is. It's not like they set your progression back or anything.
Anyway, thanks for the explanation, I just don't really think I agree that anything is "broken." It's still the same Borderlands. It plays the same way. Tina is still awesome.