Would they, though? If you can graft on an extra ghost arm, why wouldn't you be able to graft on an extra non-ghost arm?
I'm on mobile atm, but they're in the item spreadsheet somewhere or other.
+3 CL to dispels isn't the same as taking 23 because you still run into the CL cap. The others seem pretty niche. I'm not convinced. I could add it anyway, I guess, but it seems questionable.