Ugh, the one thing I didn't like about Halo 3 is starting to happen in Reach. I'm all for playlist updates for the most part, but the ones I love, get taken out. 1 flag/bomb on Hemorage was awesome. I loved it.
Crashsite was awesome. It was a challenge with certain generator placements to not die and keep the generator functional. Why take that out? I don't understand. It doesn't have to be played and it's only one person. You are in direct control over what game you're going to play.
Rumble pit is a mixed back for lots of reasons. Some people want to only play slayer, while I enjoy playing Headhunter every once in a while. Why not just make two playlists? Rumble Slayer: slayer, swat, shotty slayer, whatever. Rumble Objective: KotH, Headhunter, whatever.
In the end, you can't please everyone when you have playlists that possibly put people with gametypes they don't want to play. I love me some Halo, but I hate when they take out shit I like because all people want to do is play regular slayer.