I did't see this in the declined suggestions so here goes:
We need a way to rearrange all the items/buildings in our keep that doesn't take forever - if there was an inventory we could remove everything and then put it back where we want it that would be helpful - as is everything is either dumped or it takes an hour because once you rearrange everything and hit finish 3 times out of 4 it all jumps back to where it was when you started. I think it would encourage people to expand their keeps if it didn't mean they would have to either leave everything in the smaller footprint or try to shift everything while several times to change its location.
Fortifications should be up-gradable. People would be more willing to by lower level fortifications if as they mastered the lost art for the next level they could upgrade. As it is players either hold off on buying fortifications until they master the upper levels or have several types of fortifications all jumbled together. If you can't make them up-gradable, how about the ability to sell it back to the game for applied credit on the new level?
1. We're planning to add something like Inventory for such cases. So this suggestion is accepted, but it might be slightly different.
2. I'll pass this suggestion for further discussion.