Introduce 4v4

Please introduce 4 players for co-op seasons

Restricting it to two people limits the social aspect

Is there a reason why 8 friends cannot play a 4v4 match? I don't mean in clubs, i mean through seasons or an online match up?

I would appreciate any one who can explain why or if there is a specific reason i do not know about. 

It would be a amazing if pro clubs wasn't the only way