Exactly!
I went to this thread you suggested and see that Dan has created an issue request for this. Hallelujah! http://mcneel.myjetbrains.com/youtrack/issue/MR-2315
Related to your .plist suggestion, Rudi, I added the following over there. (Worth noting is that one can see their aliases in that .plist file, but not their custom command sets it seems.)
If anybody has additional thoughts on the topic, I suggest posting them on that existing thread, linked below. Apologies for hijacking the thread, which I hope had run its course! ~Dave
Continuing the discussion from No export/import "tool palettes sets" possibility in the command editor: