Right O Sam... I apologize because I am speaking out of turn. I have just read a bit on the SS. Installed it on my localhost, facemelting process with the .exe by the way. So I do have a bit of fact finding to look into.
In general though I think where designers get frazzled, as I know I do, is when I want to customize the placement and design of a module (which is basically our bread and butter, outside of the programming). For example customizing the navigation. I know how to do it with just straight css and html, but have no idea how to do so within a CMS...
If you could integrate and easy to use "edit module" and just as important, placement of that module it would help tremendously. The easiest way to do this, in my opinion, would be to create a list of available tags. Ex. $navi$, $footer$, $custom1$, etc. Then the designer can place these tags within a simple HTML page and when rendered it will pull the corresponding module. Then in the admin screen gives the ability to design & customize these modules. Its almost like an include on steroids.
Again speaking out of turn, your CMS may do this already... So I will shut up now and post again after I have read more.