I was thinking that we could, first of all, hammer out an agreement of what we wanted here.
Ie pangaea/continents/archipelago type map
then a subtype of what we want, ie donut type map, inland sea, blob
If we want it be be exactly balanced (ie all starts are identical).
Personally...I'd prefer something along the lines of a donut map used as a basis, and then have it heavily modified and balanced by the map maker so all starts are equal, and there are island chains and/or new continents reachable by galley. Yes, that is pretty much what I designed for the last game, but I think it warrants another, larger, game to test it out (frankly because it offers everything anyone has ever asked for in a map IMO).
What should be noted, is that there is a hell of alot that can be changed on such a map to make the game very different (ie start locations, are the coastal or not, size of island chains, resource balancing, overall shape of the donut...). It should be quite a versatile map that can be very balanced, but at the same time unpredictable, especially if Vassal states are off and toroidal wrapping is on.