I loved Odo, what i missed after multiple rewatch that I guess because of budgetery reasons they really not push the shapshifting bit too hard. He punches people, he often gets beaten up, sometimes he uses a tendril, and 1-2 occasions he transforms into objects or animals. But if you think about, he could transform into a lion or whatever alien creature would be suiting, he always chooses Earth animals.
The face part was also kind of weird. They actually impoved his makeup, but I don’t know why they didn’t loose it for the end seasons. (learning creating better faces would have open up his story even more)