No, there is plenty of evidence (videos of both gameplay and interviews where a certain aspect of the game is explicitly shown/talked) that have not been in the final game. It's the definition of a lie, the same thing happened to alien: Colonial marines. The social media may have increased the proportion of those lies, but they didn't came from the social media.
Yes, I saw that reddit post, and it was all wrong. The post implied lies, then linked to interview segments where Sean Murray didn't even say the things accused in the post.
Take the biggest "lie" of multiplayer. Sean Murray stuck to the answer that the galaxy is so big that it's statistically impossible to run into another player. If you played the game, you would know that because when you get to the centre, you literally create your own private galaxy seed.
And, guess what, there is multiplayer. The last big update put in multiplayer, and it works great. So the question of "will there be multiplayer" where Sean Murray answered yes is still true. He didn't say when. Before release, devs are working hard to get every feature out as soon as they can, and multiplayer was planned at the time. Sean Murray doesn't know how much they can get out in time of the release.
The game certainly doesn't need multiplayer for me, but this "big lie" is simply an empty accusation.
