Not sure who said there isn't going to be multiplayer as that's just blatantly false. Multiplayer support is in and works great. For the full list of everything coming in the release version we're going to have to wait until the day or if Frontier chooses to release more information before then. There's four days to go so we'll know soon!
This is a myth. I'm not clear where you guys keep getting that there will be additional features, but the Gamma was BLATANTLY stated to be feature-locked. That means no new features to test in Gamma from the last Beta version, and it means no new features at launch.
It's quite obvious which features will be included at launch: all of the features that are ALREADY included and not a single one more.
As to whether this game has MP: this game has the ability for you to play alone, online. It allows you to go online, in a group, but still alone with no way of staying in that group. That's it. There are no other multiplayer features.
To be 100% clear: there is no system to allow for creating teams, earning points for a faction or team, completing missions or challenges as part of a party/group/team/faction. All "awards", points, accomplishments, etc. are a solo experience ONLY.
Other people on this forum seem to interpret that as "plenty" of MP features, but I think most people agree it's only possible to call it MP because it's online.
This is an online solo game, nothing more.