This is illogical. Ninja Pirate Zombie Robot comes out. Abomination and Sea Witch don't go together. Each race has its own great features, but also its own debuffs. And mixing it all up will be bullshit. It would be another matter if these races themselves developed.
your option is also not realistic
so that the races themselves develop evolutionarily. The evolution of humans from apes took approximately 2 million years. Even taking into account the game time, I don’t want to wait that long, it’s nonsense.
But (insect progressors) exist that develop throughout life. there are for example: African pied grasshopper (initially non-poisonous) these grasshoppers feed on poisonous plants to protect themselves. They consume wild flowers called ragweed to become poisonous and no predators would want to eat them