Oh my... *DROOL*.
Exactly why I want them to do another fallout. I loved the atmosphere of Fallout 3 and I love the general gameplay better over the original Fallouts (I like them too but sorry, I do like gameplay better of Vegas/3) but everything else Vegas did better. They put in some nice improvements on gameplay (I love Hardcore mode) and had far better story and far better written characters. And unlike the Bethesda games I've played (Fallout 3 and worse, Skyrim), your choices actually get reflected in the game as you play along. I love how you had reputation with each faction and they didn't just respond to if you were good or evil. And the crafting was far more fun/interesting. And also the gunplay was far more fun and interesting (and I love how you had to pay attention to how well it pierced armor vs. how much damage it did).
I loved 3, don't get me wrong. But I'm glad I played it before Vegas cause I would have been disappointed with 3 if I played it afterwards. Vegas was so much better in so many ways (it took what was good about 3 and improved it. And honestly, I still liked the atmosphere but I do agree 3 did a better job of creepy/post apocalyptic feel).
To be fair, from what I understand:
1. Obsidian was given a very short amount of time to make that game (and told to move it up). They had to scrap a lot of what they wanted to do cause of lack of time (and they still managed to do a lot with that game).
2. They apparently couldn't get much support when asking about working with the game engine for whatever reason (I think what i read was that time differences made it hard to get answers from Bethesda).
So if Obsidian was given a proper amount of time to actually work on the game and good support on how to work with the engine (and honestly I wish they'd get a new engine for Elder Scrolls/Fallout to work on anyways, it seems to be a pretty buggy engine in the first place), it is quite possible they could make a far less buggy game.
That being said, yeah, Vegas was pretty bad even compared to Fallout 3 (which wasn't great). For me it makes it worse I was playing both on the PS3 (I rebought Vegas for my xbox in hopes it runs better as I never was able to finish the first game
. And it was my favorite Fallout out of all of them, including 1 though I haven't had a chance to play 2 yet).