It would be run by the problem player. He may have left the current campaign, but he hasn't left the group.
I know that he wants everyone's characters to make sense in his custom world, so he limited a lot of shit. He came up a story for one player already, and their first encounter would be in a mine. They would be a miner, cornered in a dead end. He's not giving us a choice to avoid the zombies or flee. And he's shit at encounters. Either he will make it dead easy or it will be a TPK because he never reads up on monsters before starting a fight with them. See: half-dozen ropers versus a level seven party.
Plus, as everything has to make sense for his town, we have to follow his rules. He apparently chronicled or is planning to chronicle every single residents' lives. This means we must make sense, so no non-core races. Also, there are few dwarves, and they haven't had kids, so no playing a dwarf. Same goes for elves; they haven't got big families, so no elves or half-elves. Or orcs or half-orcs. There are no halflings in town either. There is exactly one gnome. No-one likes him, so you can't be a gnome either. So basically we are only allowed to be human.
And no non-core classes, barring few exceptions. No monks though, since martial arts don't exist in this world. Or hybrid/alternate/prestige classes. No druids. They don't exist in town, as there is no floral areas for them to exist in. No witches, as he can't wrap his head around what a patron even is. No alchemists, because he hates the entire class with a passion; especially since they get extracts that can act as spells, and he thinks that potions acting as spells is stupid. Though we are still allowed to take the brew potion feat, which can be used to make potions that function similarly to spells. No swashbucklers, as he hates one optional ability they have, and therefore the entire class must be banned. No familiars or animal companions, since those apparently should never have been added to the game, though leadership is still fine on the condition that he is the only one allowed to have it. There's even more banned stuff, but I can't remember them at the moment.
And his DMPC is probably going to come out from under a rock and go "haha, I have secretly been God all along! Bow to me!" again.