The problem isn’t the number of players at all, it’s the ratio of players that play tanks/healers.
If you have 10+ assassins/specialists in the queue for every 1 tank/healer, then it doesn’t matter if you have 100 players in the queue or 10,000.
This is exactly why you see QM games with 0 tanks/healers all the time… because the ratio of players that play tanks/healers compared to bruisers/assassins/specialists is too low.
For fast queue times, in order to start a game with 1 tank, 1 healer, 3 bruisers/assassins/specialists on each team, you need ratios of…
- 1 tank for every 3 bruisers/assassins/specialists
- 1 healer for every 3 bruisers/assassins/specialists
- 1 tank for every 1 healer
It’s pretty obvious from playing QM that this isn’t even close to the case.
This is why they added bonuses to playing certain specs and why tanks and healers almost always have the bonus active, because the ratio of players playing them is too low.
When they had the matchmaking restrictions a few months ago that led to the 10-minute queues… that was the queue times for bruisers/assassins/specialists. Whenever I queued as a tank/healer, I always got 15-30 second queue times. The problem is, the rewards of bonus XP, bonus gold and faster queue times for playing tanks/healers still wasn’t great enough to get enough people to queue as tanks/healers still.