After using the Skyscale a bit to try and find a use for it (which was harder than you would think, I will get to that in a bit) I noticed something that is either a bug or a VERY large issue with the Skyscale. Whenever you are maneuvering mid-air, hear meaning using a combination of griffon, dismount, gliding, and mounting on the skyscale mid-air (not necessarily all or in that order), the Skyscale tends to run out of endurance instantaneously upon being mounted.
As far as being underwhelming, it is sometimes better than the bunny for climbing but not always because of the incredibly awkward wall holding. On top of that, the bunny still has more momentum, meaning it can utilize the dismount (8 skill) better. The best use for it seems to be that it give you the ability to afk almost anywhere in any map.