I don't really know who they are so I have no opinion on their inclusion at the moment.
Whether or not my impression on them being in the game will be positive or negative when the game launches depends on whether they're playing fictional characters or themselves, and whether they can act.
If they were playing themselves it would murder suspension of disbelief and immersion into the game universe, so I hope they're playing fictional characters. I also hope they've got some acting ability as Mass Effect 3 had Jessica Chobot play a minor character aboard your ship, and any interaction with that character was painful. (a combo of bad writing / bad acting)