Personally, I'd say the Drindian's the only one that really needs it. Maybe Draqua too. It has some uneven and fuzzy lines, as well as the problem the Sirleon had, where its albino version looks.. off.
On the Veram. Sure, they are a little cartoony, but that's always just seemed like it's their.. thing. They wouldn't be Veram anymore if you took away their style.
Heck, if you think they're cartoony now, you should have seen their older version. xD The adult's face and pose just screamed 'OMGOMGOMG.' Extremely exaggerated.
And hey. The Tesuri may have a few anatomical problems, but it has much more character and dynamic posing than the old one. The first revamp was basically just.. a dog with wings. Sitting there. Nothing special about it.
Now, it's our dog with wings. c: Little details like the feet-wings and the ribbon tail.. and apparently eyeliner, although I honestly don't see it. xD
Balet, the last Tesuri's artist, said the newer revamp provided just what it needed.
And the Uilus.. I think the Uilus is great. It has awesome shading, nice styling, and decent anatomy.
The only real problem I can think of is the adult's missing knee, and that issue's certainly not limited to just the Uilus. There are still other Creatu with uneven knees hobbling around here too. P: Meiko, Kayoki, Meragon, Kioka..
But then. A Kioka wouldn't hobble. It'd just float sideways.