So, I’ve read the patch notes. And after some analyzing there were 2 that stood out as being the strongest dinos in the arena
Tenontorex. This thing just got buffed to the moon and back. Extremely versatile and has the tools to deal with just about every dino in the game.
Quetzorion. While losing 20 attack, quetzorion gained the broken crafty strike, while also having buffed hp. It now has all these resistances while keeping the immune to distract. Erlidom having hp nerfed also allows Orion to one shot it with nul rampage again. 130 speed is crucial to beating the 129 and 128 speed dinos. You might think, what about slowers? Well because of its buffed hp, Orion can survive the resilient attack + a dodged attack and will later absolutely shred.
These 2 are interchangeable in terms of power (though I think tenrex is better in unboosted while Orion is better in boosted). They even have a 50% chance to beat each other (mind games). All in all, these 2 are in my opinion the clear strongest dinos in 2.0.