A very wise old man once said to me. "If you don't like the way things are then change them. If you are not willing to do what it takes to change things, then don't complain."
In other words if you are not willing to make a new terrain then don't come in here saying we need one. Those that have already said "Then make one" are spot on. They are not making one but they are not the ones that come in saying we need it either.
It does require loads of time and patience to make a terrain that works well, not to mention the imagination it takes to come up with an idea that gets peoples attention, but you should not stand around waiting for someone else to do it, just because you don't have what it takes to make it.
I have tried messing around with the TE but unfortunately my computer locks up evertime I try it. Therefore I won't be on the boards asking everybody else to make one.