I think they should be stronger as tames. Not their stats but what if their bite attack would decrease the targets speed so a Morreallatops couldn't just run away and their torpor damage is to low I'd say. Please make Thorny Dragon viable.
Gathers wood fast and carries it at 1/5 weight stone is 1/2. Weak on the sides so if you really like this dino to patrol keep another dino with it to aid. Excellent at killing mantis to gathering organic polymer and chitin.
If you are going to tame one of these with no dinos, be sure to upgrade your movement speed and get tranqs. When you see it whip its tail forwards move to the right you will dodge the shots. This worked for me.