I took down the intake piping today in an effort to remove the IACV. I discovered that the intake piping running to it has a sizeable hole in it. At that point it wasn't worth taking apart since I don't have the lower intake elbow. I did remove the DISA to test. The gear in it was totally shot, the pin fell out with no pressure, the flapper has a chip in it, and I couldn't diagnose the vacuum. Video of testing below.
M54 DISA X5 3.0 - YouTube