D'hara is still there.
It is possible, perhaps most players feel unactracted by the idea of having to import food all the time.
I don't think it will be any hjarder then running D'hara.
PS, how much is alley of swords producing in food?
Tranquil produces almost 500 and flying hngrs(or something) about the same.
D'Hara may not have lots of food... but it has GOLD. And a crapload of fortifications. And until recently, few entry points. With the new system, it makes things different, but still hella hard to invade, and nowhere for monsters to come from.
BR doesn't run a food deficit, but it also doesn't produce a great surplus to sell, nor does it make any nice amounts of gold. Only the central region can be fortified, and leaving it to defend any other region takes forever (at least rogues don't instant-travel anymore, though).
Not the same thing at all. Sure, D'Hara needs to pay a heck of a lot of attention to food. But it's rewarding. There's nothing rewarding in BR...