Sticky - It’s harder for you to break grabs, but you’re not likely to lose hold of anything in your own grip either.
Detritivore - An insect line mutation that lets you eat many items not commonly thought of as food. Like wood, clothing, cardboard and paper.
Maybe have lizards be able to run across water post thresh as long as they don’t change direction or stop moving?
Prowler - Cat mutation that muffles sound similarly to how ninjitsu works–and stacks naturally.
Pouncer - Once Z-levels are in gives feline mutants a bonus to damage when dropping down onto foes
Pack Leader - Lupine post thresh, activated from the mutation menu. A commanding howl that lets dogs and wolves know who to follow–you. Makes them friendly.
Maybe have mutants with superior senses of smell (Like dogs, cattle, etc.) able to tell exactly how close food is to going bad.