The Frontlines Premade issue has not been fixed.

[UnrealTai]

Uhhh..............
Premades have been forced into freelancer for years already, not sure what you're talking about homie. You cannot be in a party and "opt" to be in a specific GC for pvp.
It's not selectable, not abusable, its 100% not possible.

Whatever issue it is you're having with PVP has nothing to do with this.
Are you sure youve played all the PVP modes and so many times like you claim? You're literally asking for something that has been and already is in effect.

Edit: Azura beat me to it.
You may wanna PVP more if you aren't aware of such a basic restriction.