So I found out what may have been the main culprit of my difficulties before, the dying strum bar on the GHWT guitar. After I was missing notes left and right on Sprode, I figured that couldn't be me anymore, so I was able to confirm the strum bar was in fact dying. Now I get to send that back to RedOctane, good thing I still have a guitar hero bundle box to mail the thing back in, since all they do is email you a shipping label, no box