As a shyvana main here are some of my concerns.......
-I Only use ult to gank a single person or escape out of a tight spot, useless everywhere else
-My landing hitbox damage doesnt work 7 out of 10 times Or i get interrupted by any kind of CC
-Dragon form in general feels underwhelming, even the jungle dragon looks more menacing,dont even mention mega gnar
-Rage system is just used on her ult, nowhere else
-maybe add alternate skills for her dragon form like mega gnar? a fire blast,FusRoDah, mundo fire AOE?
-Nitpick here, but i prefer her ironscale skin over the classic, never understood why they made her blue skinned and scaly :V
-More nitpick, but it would be awesome that instead of dragon ult, she turns half dragon (like her title), think of fire emblem corrin, or that art of shyvana floating around with her arms transformed into dragon claws, horns and a tail for a short period of time
thats all for now, i bet i sound biased