If you are one of the people who bought the game to primarily play Halo CE, you will be stoked about the patch from Monday as well as the server side update yesterday. Specifically, on Monday they released a patch to improve Halo CE hit registration, and on Wednesday, they released a dedicated Halo CE playlist.
First off, the biggest complaint I have had since the release of Halo MCC was the terrible hit registration. Last night however, I felt that whatever they did, it may have actually worked. Nearly every multi-player game, I was off host. Yet, I was hitting people cross map with my pistol and getting three shot kills at range. While I only played 10 games or so, it is a really good sign for Halo CE.
As I also mentioned, a dedicated 2 v 2 playlist was released for Halo CE. This is currently running with a max game size of 3 v 3 as they work through game efficiency (although they mentioned it would be a strict 2 v 2 eventually). So far, while I would prefer a dedicated 4 v 4 play list as well, the maps and game type suit the 2v2 and 3v3 game play in Halo CE. The games were smooth with only occasional lag. Additionally, we were finding games in 20-30 seconds very consistently which is a huge improvement over release day.
If you only bought Halo MCC for Halo CE like I did, this would be a great time to give the game a chance again. There are still issues in the game, but the game play is now as close as its been to Halo CE on xbox since release.