I really love the idea of a more advanced terrain! To be honest, I share Bells feelings about it's practical use. It'd be a great visual effect but there is no real "need" for it this. So to me it is not very likely to happen.
When thinking about it happening or not ask yourself "When was the last update of the level editor?". It seems most of their focus is on mobile Graal clients and not the PC version, and not on GK. So I guess this won't happen anytime soon
Although I'd be happy to be wrong and get to play around with a more advanced terrain soon
