SX track dirt and injuries

After Roczen's big crash last week and going off a lot off big crashes and some major injuries over the last few years in SX, is it time to look at some new dirt? As far as I am aware (which I could be wrong and then my point is invalid) they continue to use the same dirt year after year in each seperate city and store it till the following year, having worked in and around quarries for most of my working life I know that over time and having the dirt shaped, ripped, riding/driven on, moved around, rolled, watered etc it will break down from a typically loamy style material to a lot finer material. Not saying the every track is like this but is it possible that this is starting to get to the point where they they need to introduce new dirt. The tracks these days don't seem to hold up as well and are a lot more rutted which could be explained in part by the dirt breaking down which can be a big issue with the faces of the jumps cupping out where they can become somewhat dangerous.