That is interesting.. I'll definitely follow this post as im curious. My guess is a lack of a smaller forage base for the bass causing low relative weights. I know they should be spawning but maybe a lack of cover for the juveniles making it easy for the population of bass to wipe them out. They could definitely still be overcrowded compounding the problem though, I have seen a pond overcrowded in a similar situation, with larger fish (at least larger than the 8-10" range) smallest was around that 11" mark. That's my long way of guessing that it's a forage base problem, but see what the more knowledgable have to say!