The pvp lobby is a weird thing, at this point it seems to exist purely to be an easy-access repair guy.
Replace the currently empty pvp lobby with something more friendly, like the Eden Group main room or mess hall. Put pvp npcs in there behind the desk with [x/x] signs above their heads (as well as the cat for redundancy if you want it), shove the repair guy in a corner, maybe put the infinitus pots thing in there too so you can grab them before you go in, and tell people they're allowed to put guild/party R> chats in desinated areas. Have a warp you can just walk out of instead of having to talk to the npc to get out.
Since people aren't allowed to put R> chats in prontea center anymore, would you really be losing anything? You can even block using warp-portal and such there, if you're worried about it becoming a catch all trade/"rescue me from einbroch" area. It would give the pvp lobby a reason to exist aside from just being access to the repair guy, and more people hanging out in the pvp lobby would encourage more people to pvp, as well encouraging community-building.