O.K. I'm starting to get the whole picture now. I can be slow, so bear with me. So far the only downfall I'm seeing with the fallaway rest is that the arrow spine becomes a bit more a factor. I still took more time fiddling with my fallaways to achieve good flight and tears. However, my last prong rest (quicktune 3000) had micrometer adjustments. I kept overadjusting my fallaways. The adjustments would always travel twice as far as I intended no matter how slightly I would move them.[:@]
So really, from a purely hunting standpoint, a fallaway is "better" because 1. less chance of an arrow falling off the rest. and 2. allows for helical fletch. I get it