It would be fantastic if Pixelmator Photo remembered which adjustment tools I opened/closed last time. I use only some of them, which not necessarily map to the defaults. By simply remembering what I turned on or off between opening different photos, you would enable an easy to use and natural customisation. It would also solve the issue already reported by other users in that thread: viewtopic.php?f=19&t=16912&sid=18bcfe28 ... 7a2c429d7e.
PS. I love your app. It's the main reason I bought an iPad