You can click on their portrait in the voting screen and it will bring up their entry in the encyclopedia.
Use trebuchets. They both take and do more damage, with the downside of taking longer to construct. "Abuse" the reserve to get all 4 out at once. You will then take out the cities siege engines faster than they can replace them.
The lost person is no longer available to :
It would work the same way it did before. They become a party all by themselves where they currently are and begin recruiting troops. This isn't some new function being requested, it is one we had before.