I would really love to be able to change certain "fixed" UI components programmatically, like labels and button names. It would alleviate a lot of extra checkboxes that I have to use to hide or show certain things if I could just simply modify the text of a label or button on the fly. I understand a lot of this likely has to do with rendering the window initially based on the fields and widths but since there is a proliferation of feature requests lately (many from me) then I thought I would toss this in there.
And, yea, it's probably already on the list .