I think that chains should be made larger and thicker for added strength, like an ATV cain or the one on a dirtbike. For road bikes, this would be a bad idea. But for DH and freeride where weight is not an issue, It would work. It's not like it would make it harder to pedal or anything, and it would be a huge difference in strength
The other thing I would like to see is Shimano drop those damn dual control integrated shifters. You guys might like them, but I think they suck. They just feel weird and the cable goes slack on the biggest gear on the rear cassette.