As the MCC has chugged along one aspect of the game that never really got an update after 2015 are the avatars. They only appear when inspecting a players score/medals in the PCGR or from your friends list. It would make a lot more sense for your Spartan’s pose for the associated title to appear in the PGCR. It adds a lot more character for other players to check out. Every game supports them and this seems like a perfect use case for poses.
Avatars could be patched out tomorrow and we probably wouldn’t see a post about it for a couple of days. They could remain in the game to only appear when inspecting a players profile from your friends list/party.