Interesting points. I don't believe that the perk you are referring to is that much of a benefit. When I've used it, I found that it was actually quite limited in that it won't allow you to respawn on teammates if there are enemies about. I find it to be a waste of the large amount of loadout points it requires.
As for Interrogation being in the tournament, I feel that it is a good game type. Since this is a tournament and everyone is playing to win, I think it will be interesting to see, because in matchmaking it is often one team farming for points, which won't be happening in this tourney. It is a game mode that requires a lot of teamplay, so i think it works well for this situation.
As for your qualms about it being a bad tie breaker, I think that it will be fine. If for some reason it does end in a tie, than we will start the rotation over again with Supply Raid.
I am however, interested in hearing more opinions from those who have entered.