I've just been in the TTS channel talking about this, and it seemed to get good support so here it is
Basically to have the Argus Array in-game as like Outpost 3 is for the Deferi. And to have an open PvPvEvEvP (yeah... really :p) daily area where you have to fend off attacks from Klingons/Cardassians as a Fed character. Or attack the array and attempt to take control of it as a Klingon, whist competing with NPC Cardassians,
The Argus Array is near the Klingon/Cardassian border so it's location would be perfect for this. The Klingons and Cardassians would also tie in with the preset story.
Oh, you mean like Kerrat? I don't know, I think I'd usually avoid PvP instances since I'm not usually in the mood to PvP. Not that I never PvP, but I think Cryptic is looking to focus their effort on making content rather than bolstering PvP. In my opinion, PvP is about fighting one another, and that we can already do quite sufficiently.