The only problem I have ever seen on split limb bows was when one side flexed more than the other and caused severe cam lean. I do not remember ever seeing that on the old Martin split limbs, but saw it a few times on ... well ... another brand that tries to claim the single cam. (the dark side) My brother also had to have his split limbs changed on an older Jennings. One side of his upper limbs had a hair line crack. Just seemed to me that there were more problems with split limbs than solid.
I still do not like drop away rests, just more strings and cables. I just prefer the prong style rests. I know them, trust them and can tune a bow up quick with them because I've been using them for a long time. In fact I think my first compound bow.
Which brings me to another thing. It took me a long time to switch from a recurve to a compound bow .... All my friends had compounds before I bought my first one, and then I didn't hunt with it even the first year I had one.