No, I'm not the first, I think I'm the 4th, but I'm surprised there isn't one of these.
Haveing just got 200, I feel obliged to create it! I actually think Extermination is harder than User now that I've got it... I think User is just about memorization and any mess ups can basically be blamed on memory loss of what you have to do do, or the terrible controls.
Extermination seems to be mainly luck, with a little bit of accuracy required.
Yes, definately, exterminator is the hardest, those controls have got me saying things that would shame the devil. I'd rather do USER 10 times in a row than exterminator once.
Until they fix these controls, It's going to be hard to want to play, which is truly a shame.