I like the changes you've made to the tower, particularly the bottom levels and the support columns along the sides.
The way you re-worked the second level (from the bottom) with the maze-like decor on the sides makes it feel much less...bulby(?) than it did before. That's a good thing, in my opinion. The room is much smaller, and feels more complete, but you didn't have to knock away a ton of walls to accomplish it.
I'm also a big fan of bordered windows and spiral stairs, so I approve of those changes as well. One last thing, yay for no more perfectly rectangular rooms!
What would I suggest? For starters, the huge square window on the middle level is a little off putting. I think a round window of the same size would look great there. Or, you could get some deep yellow and white paints, and paint the sunflower symbol into the glass (the gemspark one a little ways up your tower).
The floors are a bit bare right now. Some areas may look good with a carpet. In my builds, I take sand, hammer it into a half block, then paint over it to get a "carpet" look.
I'm really into hand making trees, so I just have to point out that I think a few little trees would look good on the very bottom between each of the pillars. I'd grab a living wood wand, a leaf want, and have at it. Of course you'd want to be able to walk through them afterwards, so I'd also bring a bunch of actuators and wire stuff. Just a suggestion.
One last thing I noticed, it seems like you ran out of the material you were using on the very bottom of the tower, since the gold only goes part way through. I think it looks perfectly fin with the blue against the dirt, so you could probably get rid of the gold on the right side.
That's all that comes to mind, for me. Good looking build, and great update! Keep it up!