When playing alone in competitive or unranked mode, I think it would be good, at the end of a match, to be able to continue playing with the same team (Without having to add friends of each player and contact each other to arrange this for later)
In my opinion, allowing players who do not know each other to be able to play together a little longer will facilitate affinities between players and team building in the long term, or even more teams for esport.