Quick, but official (from CanalPlanAC), summary response to what is already a long thread...
Firstly, I always intended the itinerary to be the equivalent of a traditional canal guide but customised for your specific trip. For that reason, spot maps and photos are something I like. I'll think about an option to turn them off, but I think we probably already have too many options for most people to make sense of as it is! I'm surprised people are so bothered by the size - they aren't big (either physically or electronically).
On printing the normal route output, to make the print-out to be the desktop version rather than the mobile (and I'm glad some people at least like the collapsed version on small screens) should involve a very simple change to the stylesheet - if it's as easy as I think it should be doable in the next couple of days.