Two things:
1. To close up and isolate Providence would be really foolish and short sighted. I agree it is the event center, social hub, trade and stall area, a place where friends gather, gossip starts and boasts and threats are made. A place for bragging, of danger and of course where all new comers enter the world. It should stay as is.
2. I really like the adding outposts/cities idea. (all smaller than Providence of course) add 4, 6, 8 new safe towns/villages. Each with a name, a few stalls, npc's, ect at various spots on the map. Each would be a new teleport added to the players travel menu. Different groups might like to socialize/trade in different towns and this would make all areas of the map more accessible to everyone. Have a little fee included if it is not boston or home teleport. BUT.................. here is the catch.................
To gain the teleport ability to a new town you must talk to the town Administrator (npc) in the town. This forces you to travel overland and find the town before you can use its teleport. To be a very well traveled explorer you must visit all the new towns to gain all the new teleports.