Mob update biomes feel more unique

With all recent updates biome are becoming more exciting to track down and find again but there are still a few biomes that seem plain not very well adventurous like savanna, beaches, birch and oak forests and even dark oak forest. Why not a new mob for each specific to that region lions, rhino, elephant all three of which are being threatened by poaching and illegal trades need awareness for savanna, crabs, jellyfish (obviously water close to shore), seagull to make it seem more lively for beaches, deer, squirrel, raccoon, possum to feel more natural for oak and/or birch forest, spider (before I get chewed out for this one which actually makes a web and waits for prey to get entangled), living tree (? Is right something different and makes for feel of being watched or not alone) for dark oak forest because this biome without a woodlands mansion is like let’s get some dark oak wood and move on. I’m not asking for all or really any of these but isn’t it time for these biomes to get some more respect and uniqueness how long has the jungle had ocelots then it gets pandas and parrots or swamps had slimes and witches and they want to add more (biome vote 2020 frogs) already which is alright though it’s already unique show some love mojang equal out biome uniqueness. I know I want a biome update what about the community.