First round of the presentation went really well. Basically we knew going in that what they would want next is a level of detail more, and that was exactly the response that we got, but the overall response to the rearchitecture proposal was totally positive. That feels good going in, because it's a whopping change and it's gonna take some serious time to do, but it looks like it's more of a "how do we get there" conversation rather than a "should we even do this" one.
Pretty much the rest of today and the first week in January will involve me doing Visio diagrams and PowerPoint presentations clarifying the stuff for the marketing team and providing a big, fat, juicy carrot to dangle to entice them into being patient. That and a few meetings to prioritize and plan a high-level process map so that our PM can play games with Project.