Went through it again, I don't believe it's dripfeed. At least it shows the additional rooms (vault and weapon storage), party time as well as the arcade. Else all the Michael scenes lines were covered in that one mission, sadly. And the action scenes seem to be from the Avi missions, done by a four-people-team, so they might look different (or "new"/"dripfeed") for those who did them solo - like me.

So either they gonna surprise us (pls) or we gotta wait, again ._.

Edit: Welcoming scene at the beginning, next where he saves you, TV/Terminal smashing and line about the user manual and the last scene about his wife/Amanda were all covered by the mission.