[Amanita]

I'd be all for replacing the windows that don't match, causing that patchwork effect where some windows are nice and reflective while others are see-through. Just as long as it keeps its sleek black coloring. I also like the horizontal banding, which was intentional, being the result of the difference between vision and spandrel glass. So I wouldn't mess with that- it's just the mismatched bits of vision glass that could use fixing.

As for the crown, I wouldn't do much at all- if there was a way to enclose the open part around the cooling towers without interfering with their function, I'd do that, just to make it more uniform. As for the mullions, the detailed ones pictured above look cool, but I'd settle for giving the ones already there a good polishing.