That's actually what I'm doing. I just had this thought as one of many. I suppose we get to a point (like DR and glass cannon issues) where you really can't think of it in a vacuum anymore.
I guess basically I'm looking to resurrect a lot of what the rebalancing project was, but on a somewhat smaller scope. So rather than an uber-fix, I'm looking more for an uber-improvement. I love what I've read in the Tome project, but I want something much less high powered.
The problem is, is that projects so large tend to fail, and I'm more looking for a set of rules to help balance some parts of the game to others that allow me, as a DM, to run a more fun game. It's hard to write something up so large that suits everyone's needs. For instance, there are a lot of books that I don't own, so I don't take those aspects of the game into account when balancing things. However, using those books, my changes might actually make things worse!