I'm on the north side of Indy. And yeah, I mix the two together.
I'm not concerned with the "Mixing them could interfere with the very precise formulas and effects we're after."
I am mixing a carb powder with a protein. If you can mix MAG10 with nuts for a meal, why can't you mix MAG10 with a carb powder (SWF)? The only difference to the "new formula" is they removed the citrulline (I'm getting that in SWF now), added electrolytes (assuming I am not over consuming these, I am using a good amount of water), and the 11g functional carbs (half of which is the same type already in SWF, the other half is too small to notice the difference when mixed in a carb powder).
75g carbs 20g protein, added leucine, electrolytes, and some goodies (citrulline, beta alanine)
... If I were to ask "What's better, drinking SWF with BCAA's, or SWF with MAG10?" I'm sure MAG10 would be the answer. Replace BCAA with whey, PeptoPro, whatever. Doesn't matter. Answer is the same. Sure, Plazma would be ideal, but SWF+MAG10 costs about $3 serving and Plazma is about $3 serving with recommendations of 3-5 servings ($9-15).