@ARDA_Rogerjak Yeah possibly. I'm not sure that without the choice it'll help. Maybe a combo, duos trios and ranked on different maps, and every 30 minutes or 45 minutes the map wheel shifts. This was you can always choose what map to play on, or worst case (as three friends) you have a choice of two.
You could make it that Ranked plays on the map the trios is not. Then you have a way for players to always choose the map they want, it might just ranked at that time, or not. Players who only play ranked get varied ranked play, but also players who don't usually play ranked will be encouraged to since the map they want is on it