I'm so happy that playlist is finally populated again! But...
As it stands, you can only play one playlist at a time resulting in what I'll refer to as the "3rd party voting" problem. If you know American politics, there's a saying that Democrats and Republicans are the only real candidates--nobody votes for 3rd party candidates because they'll never win, but they'll never win because nobody votes for 3rd party candidates. Frontline and competitive share that same problem.
It's helpful that now we can see the number of people queued, but that isn't helpful when the number of people playing is already low and the people who might have queued up decide not to queue up because the wait time is too long. As a result, people pick the quick and easy option in Push, which always has over 200 people playing (and instant-queues).
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One solution might be returning to the "checkbox" system, where you can pick multiple game mode options to queue for.
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Maybe have a ranked choice checkbox system so you can put your game modes in order of most to least favorite. The system then looks for the first game available in order of your favorites game types. If it can't find a game in 30 seconds, it moves to the next game type (while still keeping your higher-ranked choices as priority). Maybe include competitive in that list as well.
What DEFINITELY doesn't work is what we have now: pick ONE game type and ignore all others. It results in almost completely empty game types during peak hours. Let's make something happen.