Seems at the current state of this game if all gear and such be equal, winnig is just a how many melee on the team...ergo you can have a team of just melee and heals, and pretty much stomp face against a ranged and heals team all day, everyday....
Seems the devs think that range is SO powerful that they need to equalize it by giving melee far more damage and damage mitigation than any ranged class, but that does not seem to be enough so they give melee classes gap closers to neutralize the thing they justified the dmg and mitigation in the first place.
I know some of you wont agree but you are probably the premade I see most the time with 3 melee and a heal.