Oh, but I find myself entirely on the other side of the barricade, I'm all the more hyped up for this title precisely because Obsidian are doing it. I've been dying to see a more story-oriented developer go playing in Bethesda's sandboxes, and I think Obsidian fits the bill. KoTOR II suffered from having been rushed out clearly with loads of work still to be done, but I loved it to bits nonetheless and even more so than BioWare's original on account of how its plot and characters worked. And then there was the superb MotB expansion which more than made up for the NWN2 original campaign in my eyes, again thanks to some good work in the writing department.
I don't expect a revolution (just like I'm not expecting them to fix the original's lacking shooter component), it'll likely be still pretty much in line with what Fallout 3 delivered narratively, but I think there's room for Obsidian to try a slightly more focused story-driven approach. Couple that with some of those gameplay changes and the F.A.L.L.O.U.T. Shadow of Las Vegas options they're offering with Hardcore mode and there's a lot of potential there. End of the day, even if they don't manage and it ends up just more of the same Fallout 3 I'll still be happy, they've got a solid comprehensive platform and I don't think there's much risk of screwing it up. Well, at least I hope so.