I know I already said mine in the comments but i'll go ahead and list those two here as well in case you don't see em.
1. Would honestly like if you could fix the riding animation for riding the rex without a saddle. At the moment it just looks like you hover over it instead of riding it so wouldn't mind a update where you fix that animation to look like you're just sittin on the rex's back instead of hovering.

(lastly)2. Whenever I dismount the rex I end up on the ground which is normal but when I dismount in water then I end up walking underwater instead of swimming. Would like a little tweak to that bug as well. If ya see this please do lemme know if ya do think you'll fix it or not. Thanks.

Fox McCloud, that is actually a problem with the settings I believe. I will be disabling the ability to ride it without a saddle, otherwise the only other option is to disable the saddle.

As for the second Issue OMG I had NO idea it did that and i can certainly see the problem. The reason for the dismount on the ground is cause the fall killed my player in the dev kit. I'm not quitte sure how to go about fixing that as the options then become attempt to not die when on land OR attempt to not drown in water.

Though would disabling the saddle fix that little graphical problem of hovering over it when riding it? By the way thanks for fixing the second problem.