Resizable FC window

[Canadane]

Right click the header bar of the window. You can scale the window to many sizes.
Yes this isn't exactly what you're looking for, but it should also demonstrate the limitations the UI really has. With the exception of the chat log, you can't free transform the window sizes, and all data presented is preformatted to fit a specific way, so you wouldn't be able to make something bigger to see more data at once.

I wish we could, but alas.

[Rongway]

all data presented is preformatted to fit a specific way

This is too bad, since sometimes they make bad choices about data display. Having statically sized windows isn't necessarily a horrible thing, but perhaps their biggest offense is the novice network window, which separates users into pages of 25 but only lets you see 19 at a time without scrolling.