What to do with useless generals?

[Ars Moriendi]

No general is useless. Even the worst general allows you to control what is and isn't being constructed in a town. If he's bad enough he's detrimental to the public order, just have him sit next to the town so he can pop in, get some stuff done, then head out and fight rebels.
I usually have a handful of such "field governors" that only go to town when I need something done there.

You don't need governors for that.
You can control every detail of building and recruiting without using any governors at all. It's possible to select what gets automanaged (taxes, building / recruiting) for each settlement.

[Foz]

You don't need governors for that.
You can control every detail of building and recruiting without using any governors at all. It's possible to select what gets automanaged (taxes, building / recruiting) for each settlement.

Only if you play with that particular non-default setting. Out of the box, the game makes you have generals in order to manage a settlement, and will automanage how it sees fit if you do not have governors to make those decisions.

[LordKhaine]

Only if you play with that particular non-default setting. Out of the box, the game makes you have generals in order to manage a settlement, and will automanage how it sees fit if you do not have governors to make those decisions.

Not entirely true. There is a tickbox for construction/recruitment that allows you to control them even if have no general present.

Taxes on the other hand.. you need a governor to fully control.