I was just thinking about this today...
Why did Keystone's terrain park move to A51? I don't know if many people will remember when it used to be jack rabbit(or something like that), but I really liked that location more. For those that don't know, it started on the run right under the gondola (dercums) and then cut off right lower down. It wasn't well made then at all. But they had two jumps at the top section, then in the lower part they had a set of 3 and another set of 2 (if I remember right...)
The only reason I see for moving to a51 is the lift, but that old terrain park went basically the whole run so you could just jump on the lift on the side of the gondola. That terrain park had the potential to be awesome...