The system would randomly pick either it's a full melee match or a full ranged match. Melee vs. Melee champions or Ranged vs. Ranged champions.
There's nothing fun about going against 3-4 mages and 1 tank while your team randomly got 3-4 melee champions and a Support. I just think the ARAM game mode needs an update.
The problem is that certain champions feel game breaking, specially the ones with large aoe skills, aoe stuns or just overall aoe lane control, while the other team suffers and just waits for the game to be over.
They feel so one sided that it's a total coin flip. You either stomp or you get stomped, in most cases.