One other thing with divided colour developers I've noticed when playing around to see what controls I had over the image:

I used a very minimal amount of KOH for Bath B instead of the several decagrams of carbonate the usual recipes specify.

I did indeed get colour images, pH was indeed sufficient and didn't drop. The definition was terrible.. I don't even mean sharpness. There was like no gradation of colour across objects.

Rather than just pH - the amount of base used needs to be sufficient as well it appears. Though someone said hydroxide bases are not good for colour?