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The only downside I really see to match making is throwing 6 random people together into the hardest content. A nearly full fireteam should be mandatory Pre-requisites; Players must meet a criteria; level/gear/flag/etc before match making can begin. Match making queues; Solo players enter QUEUE A 2 player fireteams enter QUEUE B 3 player fireteams enter QUEUE C and pull from QUEUE C ((*may want to exclude 3 player fireteams; see below*)) 4 player fireteams pull from QUEUE B. ((If QUEUE B is empty, QUEUE A is used.)) 5 player fireteams pull from QUEUE A *3 players matching with another 3 players may create long queue times. A warning that queue time may be long or exclusion requesting another fireteam member might be better. I think this is a great alternative to not having match making at all.