John, I've found it's sometimes easier to make gradual improvements over time than to "start from scratch" with a radical new design -- just for the sake of being creative.
As an example, I decided two months ago to redo my wallet design. There were elements I wasn't happy with, and decided I'd like to start from a blank slate. Man, I must have mocked up a half-dozen prototype interiors in paper and leather before I gave up on "blank slate." I actually went back to the basic design I'd been using for five years and identified 6 or 7 things I'd like to do differently. I recently finished the first prototype, and I liked the result. For me, it was better to improve upon a construction method I was comfortable with than to go a completely different route just because I'd seen another artisan do it that way.
If your project is "way overdue," it might be time to get into delivery mode. Is there a way to split the difference -- i.e., to be somewhat innovative with your "conventional" interior? Unless you have a real breakthrough, you may have to look for compromises that will get this project rolling...
Good luck! I think we've all been there at some point! Regards, -Alex