That is called 'skirmisher' mode and is a feature of all total war games. You must be very new to all of this hahaha. You have to be clever an send troops behind them and then basically force them to run into you somehow otherwise they will just run until they run out of ammo or the timer runs out.
In the next release we have fixed that. As AI Balin will just get Moria, no more milling about around the lake for 40 turns.
Well there are two answer:
1) If you have no modding knowledge: No submods work with DaC
2)If you have a great deal of modding knowledge: Every submod works with DaC
Which ones in particular do you have in mind and I can be much more specific.
The Town_Halls serve a much different purpose and i have finally re-written their descriptions for the next release, as Redgrave says, they have been moved to join the spies.
Sadly, our 2d artist has run out of time and although we will wait faithfully for his return, in the meantime a new artist has been found and he has already made half of those images you speak of.
This was an issue caused by all Teutonic family trees, it has since been updated and they should expand their family much sooner now. Generals do not necessarily mean family members, you always have to remember that.