Not going to translate the whole thing, but it basically talks about abandoned gimmicks. These include:
* Transmetal Rattrap's Go Kart mode. The calves of his legs were to have wheels to allow him to roll in robot mode as shown in the photo. Plastic faux-wheels are all that's left instead.
* Ram Horn's horn was meant to have a retractable claw.
* Magnaboss' chest was intended to shoot 6 missiles, not 2. It also says that they would have fired in succession. Huh... now I know why there are those four circular bumps above the two missile launchers - those are abandoned launchers!

* Rhinox's wrecking balls were intended to be attached to the buzzsaws via special connectors. The actual toy connects them with chains.
* Unsolved Mysteries: Why does Depth Charge's wings have so much unnecessary articulation? What's up with the those two moving things on Transmetal Terrorsaur's shoulders?
* Tigerhawk has wings on his back as vestigial parts of an abandoned vehicle mode (tfwiki actually mentions this).
That's a cool article documenting what could have been.

I'm guessing that they were removed due to budget reasons. Thanks for sharing.
