Mastery: Glad it's gone. That kind of powerful effect made stuff like Hydro Pump even more busted than it was.
Ambush: Sad, but glad it's gone. I loved no hand water, but it was too good.
Growth: Also glad it's gone. It was either on too pointless a ninja, so it wouldn't matter, or the ninja had too good an effect, so it was snapped in half.