Re: Recent Players List/Tab
There are a tons of options they can go with too.
Such as:
Add a recently played with section in your friends list.
Add of voting system at the end of the match that automatically puts you in a group with people who voted yes.
At the end screen of a match they can add a button under each person name that lets you friend them or something, or redirects you to their profile.
Just a few idea's I thought of.