Looks great, I will be following this.
I feel like the set could use a bit more pop (R3 CapsLock/Control accents, F13 for the new Jane?), but it already has quite a lot of caps.
Will the JP add-on have the regular sub-legends from the Laser/Red Samurai/Bento sets or the more complete ones from Zambumon's sets? Number row keycaps from Serika and Striker feature additional sub-legends for instance.
Otherwise, I hope the 1.5u R4 CapsLock will make it into the final version.