I just logged in for the first time in a while and noticed that all the playlists are back to how they were originally, before the patch to crop them down for population concerns.

When did this happen and why wasn't it announced?

Go out of MP and then go back in, see if they are still there.

I had it happen to me a couple of time where all the old playlists were listed, it was just a glitch.

Seems they were back for a couple of days - I even got in a Classic lobby for a while!

It'd be great if we had the chance to play PRO and Classic again!

It has disappear again, it was so much better without onslaught, that way was better to chose only the game you want.