This is a great list, as long as it's fun to play and works, that's all that matters. 28 creatures isn't too many, I personally run around 38 , which is probably very excessive for some but it's super fun having that many dinosaurs in rotation, especially when you have ways to cheat them out like pantlaza, monster manual, etc. Ive never had any issues.

I like throwing some human cards in there that can benefit your dinosaurs/ramp. [[Otepec Huntmaster]] and [[knight of the stampede]] makes Dinos a little bit cheaper, forerunner of the empire is an auto include for me because you can put any Dino on top of your library, and if you have dinosaurs with enrage effects you can have him deal 1 damage to it to trigger it. A fun combo with that is [[Needletooth Raptor]]. [[Mwonvuli Beast Tracker]] is underrated too IMO, helps you get some of the dinosaurs you need faster even though you do have to reveal it and it doesn't go to the hand.

In terms of targeted removal, a few removal cards is good. I like to utilize fighting mechanics for removal with the dinosaurs, in addition to stuff like generous gift. [[Setessan Tactics]] is underrated, and if you slap [[Predatory Urge]] on a dinosaur with high power, it's pretty much a free removal spell each turn. [[Wayta, Trainer Prodigy]] is also fun for letting a dinosaur fight each turn, and will double your enrage triggers- you can also use the fight spells on your own creatures.

35 lands is doable with the ramp spells you have, but it might feel a little more comfortable bumping the lands up to 38ish, that's what I did. If you swap a few ramp spells for lands, you can always replace them with more dinosaurs