The photoshop action scripts are very good, but the real solution, the professional way, would be programming-scripting. There would be an infinite number of functions and tiny smart ideas for the community.
I use another program for design, iDraw (now Graphics) .. it is able to access Java, a set of programs and other systems... this is greatest strength, I would like to use something similar in Pixelmator here.
One more thing ...
Uncomfortable to always work with two programs at the same time, other settings, copy / paste, save-open .. If Pixelmator develops on vector tools, then this would be the best program that wouldn't be needed for another.
What features would you like to see in Pixelmator Pro?