This is great! Here are a couple of suggestions.
a. The three imperial building buttons do not have enough contrast. The buildings are yellow and the background is yellow. Can you put a different background? For the Atreides Palace building button, I put a background of the Atreides flag.
b. The existing Landsraad Embassy is the same building as the Landsraad Shrine (CHOAM Headquarters). Is there another building in that set to use? Whatever you do, the Landsraad Embassy button is an old one and it should be redone.
c. The Landsraad and Qizarate building buttons also lack contrast, same as (a). The Qizarate Shrine (Temple of Alia) is especially bad from this standpoint.
d. The Zensufi Shrine looks nice with the purple roof. But, the Zensufi Temple has a green roof. Can you make it purple instead?
e. The Zensufi Temple button is hard to understand. Perhaps if you zoomed in on the building to show just part of it, it would be easier to understand.
f. The Prison Camp button is pure black.
g. The War Institute button is the vanilla market button?
h. A few of the buildings are fine in the pedia but too small in game; I guess you should increase fscale and then decrease finterfacescale by the same: Mahdi Temple, Shai-Hulud Temple, Shai-Hulud Shrine
i. The Qizarate Shrine is fine in the pedia but too large in game
j. The Shai-Hulud Hall (Temple of the Maker) is small in game, and also it appears way outside the city. This will cause the Force Shield to appear huge. Can you edit the nif file so that the building appears at the center?
k. The hospital building is tiny in the pedia and tiny in game. Anyway, it does not look much like a hospital. It has a dome, and torches burning outside. Can we use this building for something else?
l. Something is wrong, or weird anyway, with the Intergalactic Comm Tower. In the pedia, you can see the ground tower and it is very small. In game, you can see the satellite, and it is huge. Can you make it just the tower, and eliminate the satellite?