Aside from the unhappy fact bonemeal no longer grows plants instantly (So now I have to lose most of my health fighting a skeleton just to get enough bonemeal to grow one wheat. Whoopee!), the thing I hate most about bonemeal since the update is the ridiculous green sparks that appear around the plants when I apply the bonemeal to them. It is a really unnatural green too. It is like the green dye they use in rat poison pellets. It really does not look right.
Bonemeal is a white powder. If there is going to be sparkly stuff appearing around the plants, why not make it white. Then it will look like the player is putting white bonemeal powder onto the plants, not rat poison.