I think it could be cool. If it's a 4 times bigger world than FO4 with the location density of Skyrim it will be amazing to explore. I wouldn't worry about the multiplayer aspects too much. If it's anything like other "survival" style online games there will be plenty to see and do on your own and everyone's immediate goal will be different enough that solo play will actually be a more efficient means by which to progress. Being able to share the experience with other people, if you want, is an option many will be excited to have. The whole project feels like something we really haven't seen before; an AAA take on a genre dominated by smaller developers. I'm very interested to see how it turns out!