I wonder.
I wonder if, someday, threads like these will come to an end on the New Vegas boards. I look forward to that mythical day!
Unfortunately, for that to happen would require a paradigm shift in many/most gamers' thinking, which I don't see happening any time soon, if ever. :cryvaultboy:
As for the OP's request, I would have to say
NO. There is
no way they could make it work without essentially writing a second copy of the game, and that's not going to happen.
Consider this, OP:
Say you choose to back the NCR, then you are given a bunch of quests dealing with the side factions. Depending on how you resolve each of these the ending slides are changed, which, by extension, would require a corresponding change to the actual game location. As each of these side factions has at least two possible outcomes and there are at least four of them, that's a
minimum of 16 possible results just for that portion of the NCR quest line. In actuality it's more like triple that, and when you run that against four main paths you have 48
4=5,308,416 possible outcomes just for that portion of the main quest. That's not including resolution of the issues facing the various settlements, nor the side quests for the main factions (especially the NCR), which raises the possible permutations of outcome combinations into the
billions, and it's impossible on the face of it to implement the appropriate changes for all of those eventualities. Even if they
could do it, it would take
years of work and massive amounts of money, which they're not going to do as it would be far better spent on making a completely new game.