Is Roll Queue a valuable system or a mistake?

Roll queue has pretty much ruined queuing for DPS for me. It's always a good 10-20 minutes to find a game if I want to play damage when I could just get a game in 1 minute on tank or support (since nobody wants to play those roles). Everyone things Overwatch is just a shooter, but it's not. Other than that, it is nice to have healers. Going into quick play classic will give you a quick reminder of how horrible things used to be when everyone instalocked DPS.