@Ploshkin - I cut out my Katherine trousers this afternoon and made a start on them. Can I ask you - did you use the "Pocket Edge" piece? I thought about it, but decided it would make the finished edge too thick.
I've also thought about cutting off the rounded pocket and lining it up with the front leg seam to avoid the problem you had with the top stitching. I only use a pocket for a tissue, nothing else, so size wouldn't be an issue.
I didn't have very long to play so haven't actually done it yet. Hopefully tomorrow.