Yeah, basically Slant Six made te game and Capcom only distributed. I think it's because Slant Six has more experience with this kind of games (shooters, like SOCOM, etc). I didn't like what they did with the Lab scenario. I think they should have used that opportunity to clear up the location of the Factory (weather if it's in the city or the mountains), and it's nearby places (relation to RE0 and Outbreak areas, which is quite confusing since RE0 and Outbreak only added confusing details).
They could have added some new areas, but should have explored more the familiar areas.
I havn't played the game yet, so I don't really know about the other places. However, since it's not canon and doesn't even add either to the story or to the already known locations, I'm not intending to play it.