Interesting link, Bob. As usual, his essays appear completely logical, but contrary to what everyone else in the industry says! I guess I am just lazy, in that I have found a couple commercial rubs that I like and I use them, instead of blending my own. I do like Meathead's theory that leaving the salt out and adding it separately gives you more flexibility to adjust for different cuts. Maybe when my current supplies of Dizzy Dust and Bad Byron's run out, I'll try some home blending.
Adam, if the salt is going to be in the rub, then its relative position in your blend is out of whack, in my opinion. It should be at the top, or close to the top. You can add all the spices and herbs you want to a piece of meat, if it doesn't have an ample amount of salt on it, it will not satisfy most folks.
Stevia is a sugar substitute, and not one I would use for cooking. You'll find turbinado sugar also labeled "Sugar In The Raw", which I am pretty sure is a brand name. As liberal as I am with salt, I am stingy with sugar. I think most rubs and sauces are far too sweet. That's a personal taste thing, but it is a trend I see in restaurants all over the country, and it is starting to get on my nerves. Every entree is "candied", "glazed", "sticky sweet"...blah, blah, blah... The head chef can't develop flavor, so he just makes it sweet.
Good luck with your experimentation and let us know how it goes!