The Frontlines Premade issue has not been fixed.

[Moonlite]

It doesn't have to be a premade only mode. Just have it so that premades queueing at the same time are against each other, not sotted together because they are the same GC because that's what happens, even with freelancer on.

If I had to take a guess they are all queing same grand company, German(or non English language), freelancer off, in progress off, and timed. So they all get out they talk in chat for a bit and see if everyone is ready. The leader will call a time in game, they watch and all click as it hits that time. I could be wrong. But unless they made some serious updates to the party grouping system it should allow solid abuse of the current system.