I think in part the scaling issues made developers turn away.  I know it took a really long time to do my Gymrat Xtreme set (but I did support even the presets-which to me were the real strength of the new figure) and I know at least two developers that wanted to give support to the Freak 4 but after getting stuck with scaling issues just gave up. 

I thought I've had solved the problem with Dynamic Clothes since he has been getting a piece of clothing almost every month for a year now.  Dynamic clothes doesn't takes as long to develop as conforming and there is (barely) enough sales so development becomes feasible.

But now with Genesis conforming clothes can be fitted to the big guy easier.