Those all look really cool I wish I had them. I agree and I would like to see more like those maybe more mythological creature morphs rather than animals (Minotaur,Centaur,Hydra,ect.)
I was also thinking it would be nice if the smaller morphs that fully turn into an animal/creature had more functionality. Such as: eating bombs would allow you to shoot fire breathe like mounts can, while in an aquatic type morph you would be able to dive (turtle), while in bat form you could enter caves that require lanterns with out using the lantern, while in cat or dog form you would be able to dig the same way you can with a shovel, while in bee form bees wont try to sting you.
Also why is it that when your in one of the flying morph forms in the rail road caves and you come across one of the gap areas you can't simply just fly across it rather than have to ride the draisaline across? I get that they want you to have to have the draisaline to be able to cross but it doesn't seem realistic.