This is a wacky idea I just had thinking about my approach to staff times, but I wonder if people would find a "staff time adjustment" option interesting? It would basically let you add on X.X seconds to all staff times, meaning you can sorta set your own incremental goals instead of just having the one. I could also let the adjustment go negative, but some levels definitely can't get faster (like 0-10), so that might not work great.