First thank you so much for made this...

This mod is awesome, you used the new 1.5 sub-maps feature to improve exploration on z level, and you did this respecting the lore.

Visit ancient urban bloks is wonderful, i hope for something like this for so long time.This is best mod ever in my opinion.

If i can i would suggest to consider some additional feature for future update:

1) Implementation of enemies ai to pathing between levels. I can understand you take compatibility in to account but i think there are some tricks that could help avoiding to incide too much on performance or compatibility.

- You could consider for example to make this ai only an option, on this way players could choose if activate it or not.

- Alternatively you could consider to make enemies change floors at random or only every X time, this could help a lot to simulate the fact that they visit multiple maps and hunt you without immersion break doing it only few time per day. I think this would be very useful for scenario maps, you could choose for example to activate it only in this case. I think is strange that raid dont come on second floors..

2) Implementing a way to transfer resources or items between levels at least on base map (like that on your scenario). I think this is crucial to help the player to enjoy for example an undeground bunker.. without the ability to transfer resource the experinece is limited.
Here instead to implement something complex like the old z level, i would suggest to choose the easy way talking with Deep Rim mod author, they have already a way to transfer items between leveles, you could same feature for stairs or for example for advanced ancient storaging building to research.

if you will do this on next months than would be amazing, if you will not do this your mod will still be my favorite on workshop, again thank to you and your collaborator for this gift.