My suggestion takes into account both the complaints about lack of green areas on some places and the complaints about lack of diversity on the regular spawns.
What I would suggest is that all park-exclusive dinosaurs be redistributed between the local/global spawns, and park areas become a mix of area-specific dinosaurs. The park spawn list would be changed periodically, and would consist of species from the 4 main local areas (a common from area 1 and area 3, a rare from area 2, and so on).
This way, people that live in “parkless” areas won’t be completely missing any dinosaurs, since they will be avaliable in the regular areas, and people that have acess to parks may find them interesting to explore, to either get dinosaurs not from their area or get extra dna for specific hybrids.
I would love to hear what you folks think about this!