I have never read a negative opinion of the Fallout series games, or Skyrim V, in the 3 MMO forums I've reviewed. In fact, all I see are kudos about how well they are designed. Bethesda has a knack of publishing quality games. I tend to believe that in any endeavor (to include an MMO) their work would remain decidely above the littered field of MMO's that were disasters.
Right, because ultimately it was YOUR world to play in. You throw 14 year old idiots screaming into their microphones any time you do something they dont like, trolls trying to PK you for the lulz, and general pants on head stupidity, the value of the game goes down. THAT is what the Fallout MMO would be. First the die hard fans would show up, then the wave of general public, then thats where the crapstorm comes in, the whiny majority that screams '____ NEDS TU BI DELCEE! ID BAI EET!' and soon enough the MMO says piss all to any semblence of the series and becomes crowd pleasing.
It's better as a single player game. MMO is basically Moron Multiplayer Orgy. No thanks.