I love Shyvana as a concept, but I have a lot of gripes with the Dragon form design. Part of this stemmed from a general dislike of the "forelegs are wings" concept that I really, really dislike for Dragons. It is a personal gripe, but I associate the design more with Wyverns than Dragons and I just cant look past it.
But my big gripe is that the design does not match the existing dragon design, nor the old one, with Shyvana's form having 4 limbs (forelimbs doubling as wings) while the actual dragon has 6 limbs (4 ground bound limbs and 2 wings).
Now off course it should not be a complete copy in terms of design, that would be boring, but the ability is called Dragon's Descent and states Shyvana transforms into a dragon, not a half-dragon. I would love just a bit of consistency on this area, that you could actually see that Shyvana's dragon form is related to the dragon on the Rift and not some elongated reptilian monstrosity with pathetic wings.
I will say Shyvana's dragon form design is wonderfully unique, I just don't associate it with the dragon shown in game and things like the wings look pretty pathetic on an individual level...oh and the fact that any kind of displacement stops the epic dragon descent in its tracks, but that is a different story.