I see oodles of utahraptor daily. I think it just depends where you are.
In our Alliance, most requests get filled. Right now the only ones I see not completely filled is Dilo because we just had the Ourano event so everyone has been requesting it since, but they still get to at least 300. All other rares usually get filled or just about filled, save Irritator but even that I see at least a few hundred per request. Everyone in our Alliance is amazing and will typically even donate a few taps of something they need themselves for a dino they’re working on. Everyone’s teams have just skyrocketed from donations.
Spawns have definitely been nerfed, especially epics. Many people have even noticed specific dinos become non-existent in the wild when the store is selling something containing that dino (raptors and Rex when they were selling the Halloween incubators again, Rex now that they’re selling the guaranteed Rex incubator, and stegosaurids when they sold the Stego scents, etc). They claimed this “migration” on the last update like they were doing us some huge favor because people had been screaming for a migration for months…but I don’t think taking all the useful dinos from the wild and putting it in parks, and migrating all the park trash like Nunda and Majunga to the locals was exactly what people had in mind.