[schlagwerk]

I wasn't expecting much out of this guy, but his extra poseability is a nice bonus.

If feels like some of the articulation is a by-product of the overall design that they decided to run with to add value.
Like the legs going out were necessary to make an accurate frog zord, so they tossed in ankle tilts to take advantage of it.
The elbow on the ape zord was a coincidence because of how his legs split. See how they made no effort to also add an elbow to the wolf zord. It just happened to already be there for the ape, so they advertise it as if it was intended articulation.

That said, the crazy poseable arms on the ape look completely intentional.