We have to remember that Beourine is the equivalent of the Soviets or
the Americans in this campaign. In any case it would be he who asked for law
holdings in your realm. There are only a couple of domains in which their
regents have complete control of their law, and these are Avanil and
Beourine(this according to RUINS OF AN EMPIRE). Does the US allow other
nations to have a MILITARY BASE in their territory? Do the Russians?
On the other hand I do agree with you in that Dhoesone should push for
guild holdings intead of Trade route. But not too much. Remember that trade
routes produce and incredible amount of regency. Even if you have a low blood
line this amounts to a lot of political muscle. And Dhoesone's regent has a
decent blood line.