It's an interesting idea, I can imagine the Table station itself with Cap standing at the window rubbing the grime from a glass as he looks out at an open PVP area with **** knows what going on.
But I'd rather they make a brand new open PVP Kerrat style area in several places of the game, each with it's own grindworthy reasons to go to each one in order to draw new players in. Many will see a potential space set you can only get from killing X amount of YZ and surviving ABC in order to get the set as honey. I'd rather Cryptic take Cap's Table and find other ways to make it worth going too. I think there was a thread about it in the General Forums a few months ago with some awesome ideas.
One open PvP/PvE hybrid zone per sector would be overkill... but there ought to be one in Beta Ursae and that sector Memory Alpha is in that I haven't been back to since my characters all finished the Romulan arc.