Somehow I missed this excellent post when originally posted (damn end-of-year push at work I suppose). That's great to hear that you've finally gotten the room correction work done.
Now that winter is forcing me indoors for longer periods, I'm about to get back on the horse and dial in the DEQX. May go back to the beginning and redo my speaker measurements based on the recommendations you made. Also got some Giant Gliders from Herbies to give me a little decoupling from the floor which should also make moving the speakers around a bit easier. That'll also enable me to dial in my speakers positioning in the room first, before beginning the room correction (as an aside, I wonder if the DEQX makes speaker positioning less crucial than it otherwise is? Within limits of course).