So here's an update to my clutch chatter AND decel noise...
I went back to the SUBARU (not exedy aftermarket OEM) OEM clutch... problem solved! Amazing.
The Exedy Stage 1 HD started slipping with less than 50k miles on it. Mind you, I don't launch the car, EVER and I am pretty gentle with my shifts, I don't "bang" gears. Obviously I wasn't too thrilled about that, but at the same time I was kind of glad it did.
Like I said before, that is about the only surefire way to solve the "problem" and sure enough it fixed mine. Obviously there are exceptions to the rule, but it worked for me, just as I figured it would. I am a happy camper again.