i think you can categorise the actions? that might make it easier to find the action they want to take.
also, you might want to look at Snapseed, Google's photo editing app, as an inspiration for how they managed to put so many buttons in one screen.
Which one do you prefer ?
You are slated with an issue of integrating form and function (aren't we all).
From a purely aesthetic viewpoint, I prefer # 3 or # 4. I find # 1 and # 2 to be very distracting with all the different colors- especially the lime green button on # 1- it does not seem to go with that more pastel color palette. The highly contrasting ...