Actually, I think it might be okay keeping Development at the end.
Realistically, there may be those who don’t move to the next level, and one could certainly, I think, build MODx sites, administer them without moving to that next, more advanced Development level. It could start to introduce a bit of a mental overload for some of us
Those who consider themselves "developers" are probably going to skip to that section first no matter where it is. This could also be a way of saying, okay, now that you’ve got a site installed, designed, up and running, getting comfortable with how things work out of the box and have an idea how editing works, either for yourself or for your users... now, just as you were getting bored or starting to think you have everything mastered, you are ready for some turbo-charging.
I forgot to mention earlier, but I really like the idea of some future distros. This is something that the Drupal camp is really starting to grasp on to, even to the point where anyone can create their own distro... talk about creating a dream packaged for designers/developers. Not only will this be great based on cutting through some of the confusion and helping people get up and running quickly with a very specific need, I think this could provide an excellent learning tool, kind of a live tut in a box... need to know how to setup MODx as a blog site? Grab the MODx blog ’n a box and away you go. Need a typical brochureware site with news publication? Here you go.