Hello Ray,
I decided to copy my answer in this thread as well. Here is LSS Arch Lite thread where I posted basically the same reply.
I agree about problems with UI in LSS Zone (lack of direction lock using Shift key while drawing and editing for example etc). I added recently a "Zone" tool to a full version of LSS Arch. It basically uses the same logic for zone object as free LSS Zone extension, but utilizes UI logic of LSS Arch (so zone tool behaves basically the same way as other LSS Arch tools, direction lock is available etc). I tested how zone tool works in LSS Arch during a project, which I'm currently involved in at work, and I'm mostly happy with results (I revealed a couple of minor problems in zone tool inside LSS Arch though so fixing is in progress right now and nearest minor update of LSS Arch will contain those fixes).
So now I have an idea to publish new commercial LSS Zone Pro extension, which would utilize UI logic of LSS Arch and drop support of a free LSS Zone extension, because I'm afraid I have no ability to continue developing of freeware projects (at least at the moment). Such new extension can be used in combination with LSS Arch Lite (such combination would provide ability to trace quickly closed spaces bounded by walls). I hope this plan will come true someday.
Sincerely,
Kirill