(The following was already posted in the NW Pro forum - but maybe there are folks here who have thought about this and think this could be improved in NWX.)
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NW Pro beta 1 had a great improvement over NWE (apart from starting up very much faster on my G5): in the window that shows the spacing between the lines, I could type fractions (e.g., "1.2 lines"), or the spacing could be increased by jumps of 0.1 lines by clicking on arrow next to the box. For me this was a big improvement, since professionally I use some eccentric fonts that don't read properly when single-spaced, and 1.5-line spacing often just looks ugly, and I want to know just how much the spacing in my document is in any paragraph.
Since this was already working in NW Pro beta 1, it should be a cinch to put it in here too.