Fix These Mobs

Ok so every basic mob that spawns during the day is useful, except pigs and llamas. Yes, pigs give you food and llamas give you leather, but pig food is worse than steak and cows also give you leather. My idea to fix this is to make it so every 5 minutes or so the pig may dig up something from the ground and drop it, like seeds (of any kind), saplings (of nearby trees, or rarely trees from other biomes), flowers, carrots, apples, glowberries, sweetberries, etc. Llamas should get to be tamable (by wheat) and once tamed they spit at hostile mobs coming at you. You can put them in a sit-like position so they stand guard and spit. And you can get llama armor from armadillo scutes.