recruit lords

So I temporarily expelled a few clans in my kingdom to gain their fiefs but now when I try to recruit them back by talking to the clan leader there is no option to. I tried going to war with the clan and capturing the leader too but that didn't work. Do I have to wait until they automatically...

I assume it's being developed already, but it would be convenient to talk to prisoners who are in dungeons the same way you visit or talk to notables in towns and villages (clicking on the portrait of the vassal/noble in the dungeon, then click "visit" or "talk") instead of having to walk...

I think it'd be great if you could recruit vassals who are prisoners in your party rather than having to bring them all the way to a dungeon that you own to convert them there or try to engage them in an encounter when they're not leading an army.

I have seen countless videos and read lots of guides, but it seems that I still miss how you convert nobles to your faction. I have 275 charm (playing in 1.6.5 currently). 3 cities, 2 castles. I basically built an entire campaign on Charm just to be able to convert them to my kingdom, but I FAIL...

Summary:What should I do to recruit the lords to join my kingdom when they say (I am happy with my current liege. Nether your purse nor our relationship is deep enough to change that.) For your information I have good number of fiefs and money but it always show to me this ?! How to Reproduce...