I personally don't see any clear and realistic end-point to Mathilde's adventure in K8P. The kingdom could be counted as reasonably well secured in 10 turns, but it's basically an endless position. That said, the end to the Stirland part was also surprising and worked quite well.
I can see the re-conquest of the Eight Peaks reaching a conclusion, but it probably means that new challenges would simply arise after a time, whether it'd be to defend the Eight Peaks from an attempt by Skavens or Greenskins to gain back a foothold from the peaks, smashing a Greenskin Waagh heading for Black Fire Pass, or reclaiming Iron Rock, Black Crag and Thunder Mountain. I can see Nagarthye happening in between the completion of reconquering the Peaks, and whatever Mathilde chooses to do next, whether it'd be to remain at the Eight Peaks and continue serving it, or to explore a new region, or to return to Altdorf and participate in College Politics, or to take whatever doors she manages to open in Ulthuan, etc, etc.
Speaking of long-term plans, I really want to work towards becoming a Magister Lord. I think any Mega-Project like the tower of doom is a great step for it. I'm also pretty sure that the concept could even be applied to the larger tunnels. Basically, build a Burning Shadow room into a check-point of the Grand Avenue and place a huge light-source behind it. Voilà: If anyone tries to storm the tunnel, the dwarfs can pull a lever and the assault is melted. Much too expensive for anything more than the largest of tunnels, and any serious assault could probably wait it out, but it should seriously beef up those central cross ways and tunnels.
The Radar Map of the Eight Peaks was another long-term project that seems to go very well with the idea of creating similar defenses within appropriate parts of the Underway. Remember, the IFF system alone of these towers would give the authorities of Karak Eight Peak advanced warning of large scale enemy incursions in the Underway if Mathilde could learn to manufacture them, so long as they aren't facing a Shaman or Grey Seer powerful enough to hide a significant force from it. Infact, without the RADAR MAP Project Cartographer Room that doubles as a control room for triggering Burning Shadow check-points, I suspect that making the Burning Shadow room idea workable would be tricky since it's likely dependant on early detection of enemy armies.
Slightly late, but having a truly traditional yet also optimistic dwarf on his side probably plays a major part in keeping him sane. I'm very glad that at least a decent part of the stockpiled steel could be put to good use. Even if it is (sadly) not the largest sword in the world, it should count as a weapon to defend the Karag.
Gazul himself blessing the Tower Superweapon that King Belegar's open-mindedness allowed him to eagerly Greenlight probably also helps alot with Belegar's Mindstate. The Sword of Gazul itself smiting enemies that besiege the Eight Peaks more or less demonstrates that at least
one Ancestor God openly backs King Belegar's reclamation thanks to the intercession of Kragg and Gunnar.
I wonder when the pilgrims of Gazul will begin to flock to the Eight Peaks.
Also, it strikes me that Mathilde literally is living right next to an example of a Theurgy Superweapon, that she herself proposed, co-ordinated the design of and witnessed the construction of every step in the way. Something tells me that if Mathilde was to succeed in Project Theurgy, most of the Grey College won't be batting an eye given where she resides.