From what I have seen in this game is that the leaves don't decay, leaving a big blob of none useful leaves (other then giving you plantable trees) So maybe in the next few updates you put this in? And plus, the leaves cast a shadow so any bad guys that stay under it cant get burnt by the sun!
It used to be this way. Then it got broke with the halloween update (How, I don't know..). I'd imagine that notch will fix it.
Rollback Post to RevisionRollBack
~ I've thought about the phrase 'Money is the root of all evil' and I have to disagree. Evil isn't dependant on an object. I say that want is the root of all evil.
Leaf decay.