These feature are added for overloadingly crowded lobby, when u cannot follow all happening game and player presence changes in playerlist.
Changing player presence in messages in chat messages is for, knowning if the guy who chatted into chat is atm present or not.
Optional updates player presence to chat messages dynamically in brightness and optional presence dot in color if wished.
It can also add additionaly ratings to player at sender in messages (same style like in gamesetup and ingame), for directly knowing what rating is from player chatted.
like this (presence sender)