I just want to give some scientific insight to some of these animals, in hopes it will inspire unique abilities as well as be educative:
Allosaurus - nothing to change here. I know it is a new dino, but I wanted to say it was the wolf of the Jurassic, so having them be pack animals is perfect!
Carnotaurus - was a sprinter that chased down smaller prey. may have had feathers on its useless, rear-pointing arms. This should be a fast medium-sized carnivore.
Compsognathus - they ate small critters, so maybe they get a buff attack towards other shoulder-sized dinosaurs and insects?
Dilophosaurus - sigh, you went with the mutant Jurassic Park version. This will forever cement the notion that Dilophosaurus was a small, poisonous, frilled dino. Skipping, it is just a game after all.
Direwolf - the alpha thing is a complete myth. The originator of the alpha wolf concept retracted his statement, as he corrected himself in observing a pair of parents and their offspring, not a mixed pack of wolves. There is no such thing as an alpha wolf. Like the Dilophosaurus: it is a game, skipping.
Dodo - they were known to group up and swarm an attacker in defense of one of their own. They had a powerful bite too. You could make their AI like the Grunts in Halo where they run away after some of them are killed. It was this defense mechanism they had that assisted in their extinction as sailors were able to harvest them easily.
Iguanodon - oh my gosh...why is the four-legged stance infinite stamina but the two-legged stance is not? Walking on two legs is MUCH more energy efficient, and it makes sense that would be the running mode. I understand you did it this way as its combat mode would be two-legged. I know you wanted to have the two-stance thing going on, but just do not bother or make the four-legged stance the only way for it to gather resources and be berry exclusive. Hehe, very berry exclusive.
Kentrosaurus - those spikes...are you sure you could not just knock the size down by oh I do not know...50%? Big spikes are cool, but that size is a bit ridiculous. But like I said the first time, it is a game and having exaggerations is fun.
Lystrosaurus - it is the same size as the other dinosaurs in its category, can we please pick it up?
Megalodon - starter water dino, but is on the bottom tier of utility. Since sharks are adept at sensing blood in the water, maybe it can see hurt victims in the distance or have some time of radar/tracker to assist in said sense?
Oviraptor - as players have been asking: have it pick up the eggs as it wanders around and give it a weight reduction thing like Mammoths have with wood. This would be fantastic! Also, Oviraptor should be renamed Ovinutrix as the original fossil is actually of a parent protecting its clutch of eggs, not stealing from them. It would be great to rename it this in the game as it also accompanies the buff it provides...or make two variants of them: one buffs the egg production and the other harvests the eggs.
Pachycephalosaurus - does anyone use this dino? I had a good time when I tamed one when I started playing...but it was useless. No good abilities, kinda slow, and poor weight. This would be a great early game dinosaur for knocking out other dinosaurs with its headbutt attack, which is most likely what it was used for. That or flirtation, definitely not competition between rivals as it does not work out (its like hitting two balls together).
Parasaurolophus - needs a call out method for hazards. We know what it could have sounded like with its tubular crest, so you can put that sound in the game and set it to sentry mode. It will call out when an intruder is nearby. I did this for a Corythosaurus dossier which I keep trying to send to you guys for the digest but it seems it never gets through
Phiomia - this ELEPHANT type creature was adept at digging for roots. The only reason to ride one is to place it somewhere, which is not needed since we can whistle or command. It would be fantastic to give it the ability to harvest rare flowers or mushrooms while riding it, as they would help out the early game greatly. I never had a reason to tame one of these poo-tanks.
Pulmonoscorpius - like the Pachy, it would be awesome for it to have an attack that is meant to knockout targets. The Karkinos can grab enemies with its claws, so why is it that this guy cannot grab medium or small targets? Imagine grabbing on to a dino and stinging it! So much awesomeness!
Raptor - they used the sickle claw to pin down smaller prey. Please stop having them attacking medium sized targets, at least while they are alone. Give them a pack before doing this to go alongside with the media representation of them like the Dilophosaurus.
Rex - had a bite powerful enough to crunch bone. And we found bone in their feces. Maybe a bonus to harvesting corpses or some kind of debuff with its attack?
Sarcosuchus - crocodiles grab and drown their prey. Maybe make it like a slower Megalosaurus that is also aquatic? This would be a really fun PvP tactic for PvPers.
Stegosaurus - the thagomizer is why I love this animal. It is unique in the animal kingdom. It is also evident that it can break off and stick in the attacker, and the broken thagomizer spike will grow back! This is perfect for a slowing/pinning debuff with some bleed damage, as the Stegosaurus is so freaking slow! Its default sprint speed should be its walk speed, as it also has poor stamina. The bony plates were used for intimidation and flirtation. Enough dinosaurs provide insulation, so no need to go with the "veins on plates absorbing solar heat" thing.
Triceratops - the frill is for show, I wish it was more colorful. They are a bit too slow and the stamina is just on the bad side.