Think about the developer tools you have in your browser. Especially the "Network" tab (I'm in Chromium but most browsers have equivalents)...
I'm currently running an XProc script which takes a lot of time (compiling a catalogue). It makes thousands of HTTP-requests using p:http-request, as well as a p:load and a p:store.
So I was thinking; wouldn't it be cool if I could monitor the progress of my script by looking at the network traffic? Of course, I could use Wireshark (or similar), and I'll probably do so as well. But if it were more tightly integrated into oXygen like it is with browser developer tools, I might be able to trace the request and response back to which XProc line made the request etc. Just an idea...
Regards
Jostein