Personally speaking, i enjoy testing as well, i've got no problem with that as i find the gameplay interesting. Though, I'm a bit concerned with how bad the new player experience is and the matchmaking as it provides noisy data, which is not great to build the game.
I would disagree with your...
Having two separate queues also allows to have two different "tests environments" which also allow to better understand what the two crowds are more likely to do differently, and it's interesting data to compare.
Also it helps to have a saner testing atmosphere as deadlock is extremely sweaty...
The matchmaking as of today seems off, here are some very unbalanced matches with probably a mix of first timers and experienced players:
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