3.3.15 halo: the master chief collection content update notes

MATCHMAKING
Made a variety of updates to improve matchmaking performance and success rates
Improved matchmaking search times/time to match
Improved stability throughout the matchmaking process across all titles
PARTIES
Improved party stability
HALO 2
Made improvements to multiplayer shot registration
Improved campaign stability across a variety of levels
Addressed stability issues for matchmaking and custom games
Fixed issues around resuming H2A Campaign from “remastered” mode
Improved medal display consistency
HALO: CE
Fixed issues regarding aim assist which resulted in the reticle being pushed away from an enemy
Improved shot registration consistency between host / client in peer-to-peer custom game matches
Resolved a variety of UI inconsistencies, including team color randomization, medals, and in-game scoreboard display
Let us know about your experience, and check back for details as the team continues work on next month’s content update.

https://www.halowaypoint.com/en-us/community/blog-posts/3-3-15-halo-the-master-chief-collection-content-update-notes