I don't understand the disappointment on this. It rarely ever worked in Halo 3, usually ending in you getting stuck in a blackscreen for 5+ minutes. I'm pretty sure if something like that could be improved, they would have put it in. There's a reason it was cut from Reach...
I only need it for two people really. It just saved a lot of hassle when me and my bro would be in the same game, I or he would do something sick then we'd load the vid up at the next tea/cigarette break whatever and quickly skip to it. Now I have to go through the whole rigmarole of leaving the party to go into theatre alone, skipping to the clip, recording it, naming it, saving it to my harddrive, then coming out of theatre, finding the clip in my local files, then having to wait for it to upload to my file share, then he has to download it, then he has to load it, then he has to watch it separately. If it's a single snipe or a minor moment of amusement that happened in a Hog I can't be bothered to do all that. Party of two enabled in theatre would circumvent all of that. We know it can be done because its five year old predecessor managed it (it worked fine with only two people, particularly if both of them were in the game being watched). It truly is a case of 'good enough' in this instance.
I have great memories watching tons of replays with friends on Halo 3, I'm very disappointed about that not coming back.
Bungie advertised group replay viewing as an amazing social feature when they announced theater (that mp vidoc part with the guys chearing the slowmo headshot)
Exactly, who goes to the theatre alone?