Sulfur Cubes - Missing Some Things?

It's awesome how the sulfur cubes can split like slime blocks! It's also cool that adding different block types makes them act differently, but I just wish that adding blocks into the cubes worked with slime blocks (that would probably fly for like 100 blocks XD). I also think that the sulfur cubes should leave a slime trail wherever they hop, and if you touch it, it will slowly damage you and slow you down. Another cool feature would be to be able to use them as storage (e.g. put up to 5 items inside and you can keep them in a bucket, and then take them out and check the inventory). It would also be cool if they would randomly pick up a block and eat it, like eating a wood block and it acts as if you put the block inside it. Also, what if they ate mobs? Like, if one just happens to be in the path of a zombie, and then the cube eats it and stretch to the mobs size. You would even be able to watch the mob be digested, and then when it's fully digested, the cube returns to a normal size.