I have uninstalled Wacom, went through all the folders to purge any remnants, and did a clean install of the latest Wacom driver (WacomTablet_6.3.18-4.dmg.) I have upgraded After Effects to the latest version. I have tried all the brush settings (AE is fairly new for me.)
There remains no pen pressure - and only in After Effects CC, I am happy and fine anywhere else.
Is there *anything* else we can do? Unhappy camper.