According to Halo's community director, Brian Jarrard, this latest update hasn't resulted in the outcome the team expected, and matchmaking issues persist. There have been requests from players to remove BTB challenges while there are still issues, and Jarrard says the team is now investigating this.
Head of design at 343, Jerry Hook, also noted how "work would continue" to resolve the issues.
Although there are still issues, the patch has resolved various other problems elsewhere within the game. Yesterday, 343 also sent the game's latest multiplayer event live - Cyber Showdown, which will run through until the beginning of next month.
If we hear any developments, we'll be sure to let you know.