You're free that have that option about MM not being a part of your perception of value, but can I ask why? Most of us have MM as the overwhelming majority of our time with any MP featuring AAA game, DLC being a part of matchmaking or not is the number 1 reason for purchasing DLC personally. Without that I don't see much value to the maps. I regret purchasing Noble and Defiant map packs. They were not worth the money because I've rarely played them in MM.
I respect your opinion, and understand where you're coming from.
For myself, I play online Halo, little if at all anymore. This isn't due to the game being 'stale', it's just that I have a job and tend to dedicate my time elsewhere...regardless, I play on LAN, a lot, with my roommates who are a blast to play with so I feel like I get good value of the maps. We rotate Mythic disc, CEA, and vanilla Reach (occasionaly Halo CE, 2, and ODST Firefight) so we see a lot of action, and a lot of varied stuff that from my understanding, doesn't appear in Reach MM anymore.
Understandably, this lack of content in MM is disappointing, so I suppose I'm a bit biased because all I do is LAN and pick the maps that I want to play.
Apologies for being disingenous about the current state of Halo's online environment.
I still dislike CoD MP though.