It wasn't really bad, and it wasn't a mistake. I liked broken steel, and all of the people I know agreed with the ending flaws. Broken steel was a step in the right direction, and now that I know that they're stepping back, it's irritating. :sadvaultboy:
My problem with the pre-Broken Steel ending of Fallout 3 is not so much that it ended the game but that it was really stupid and made no sense, so really, what Broken Steel was to me was basically Bethesda's way of saying "Sorry we gave you a really horrid ending to our game and I know we should fire all our writers for that idiot move, but that's all over now, at least we're fixing it in this DLC that will also let you play after the main quest is finished and raise the level cap to compensate for that mistake." So basically it was intended to fix mistakes made with Fallout 3, a fix that would never have been necessary if Bethesda had given us an ending that made sense from the start.
Obsidian decided to have the game have a definite ending, though, and that's fine with me, if they think that the ending they're going wih would be cheapened if you could continue playing after it, I'll trust them on that unless actually playing the game proves otherwise. Just as long as the ending doesn't fail at doing that important thing stories are supposed to do in order to avoid confusing audiences or making them want to bang their heads against the wall until they forget about the stupidity they were just exposed to, that thing you would think most good writers would realize they should do called "Making sense", I'll be fine with the choice. I'd have preferred being able to play after the main quest, but most games don't let me do that, and I still play those games, so it's not like it's a requirement for me to enjoy a game. If I decide there are still things I want to do before finishing the game with a character, I'll just go do those first before going past the point of no return, since what I've heard seems to indicate that the game will make it clear enough when you're about to get to the point where you can't get back out and just have to move on to the ending.
As far as the other things, not being able to get as many perks with one character really doesn't effect my opinion of the game one way or the other, since really, what amount of perks is right for the game really depends on how the game is set up, I want an amount of perks that's balanced for the game, since I haven't played the game, I can't say whether perks every two levels or whatever we get now will be balanced or not. I do have to say this, though, I hope that Obsidian will do a better job at making all perks worth choosing than Bethesda did, since in Fallout 3, there were already perks that were a complete waste to choose, when you get perks less often in New Vegas, you'll want to be more careful about which perks you choose, which will make the less useful ones see even less use. As far as it being much harder to create a character whose good at everything, that sounds good to me, after all, this is an RPG, a genre whose main appeal, to me, has always been creating and developing various different sorts of characters, which is rendered rather pointless if characters are all going to end up being pretty much the same if you play them for long enough, so if Obsidian is making an effort to avoid that, I say good job to them.
(Did Bethesda do this intenionally so people would buy the DLC so the game would continue? I have no idea.)
The fact that they went with an ending that needed to be retconned for Broken Steel would suggest "no".