I voted split.
And the only reason i did so, is because there are not enough fiefs, to accommodate all those interested in strat, and too much affect on the average player, by the stranglehold of the larger guilds.
The 100 gold per hour for visiting, as a owner setting is rediculous, and SHOULD lead to a percentage chance per day, of a revolt by the actual AI commoners living in the fief, against the controlling entity. That way, it could still be used occasionally and temporarily, but not without possible consequences, and not as a permanent way to hold down the entire game, and greater community, in a rediculously unrealistic fashion.
I'd rather see more fiefs added if thats even possible, or even a new map with a better border, but if neither is possible, split it. Please.