MM Maps selection

Why does 343 not use all the maps that come with the CD in MM. And why do we not have the option to play the extraction in an objective PL?

Wow haha I was just thinking about that. I decided to go on customs and go through the maps and I noticed that there were 3 maps that I’ve never seen before and I was wondering why they aren’t in MM. My friend told me that those are forge maps but one of the maps was kind of like warlock, I doubt it’s for forge.

They’ll be putting up Extraction on Dec 10 when the new map pack comes out. I really was looking forward to it when the game was released though. I dont understand why they didnt put all of the new gametypes up for MM on the first day for us to try out