You will struggle with balance and vision probably as long as you carve decoys. At least a lot of the carvers I have known did.
If you truly do gunners, the struggle will be with the number you want to get done, the time you have, and the quality and detail you can put into those decoys in that amount of time and effort. When you are done, you will probably see a few details you could have added that wouldn't have added that much time, but which would have made the decoys better. When I made some gunners last fall, I intended to do 3 hour paint jobs on each decoy, but as I painted, it kind of grew, but at the same time, I knew when to quit.
There will always be the artistic considerations too. When you reach the point of being able to make and paint high quality competitive birds, will you be content to take some speed off to make usable gunners? And when you become infatuated with some of the older decoys and want to do decoys honoring those carvers and their styles, will you be able to keep the paint and carving to those simpler styles?
The answer I have come up with for me is almost oxymoronic: carve what you like, put in as much or as little detail as you want, and in whatever you do, do your best. When I overthink it, I engage in mind screw instead of artistic creation..........
You gotta find your own answers..............sometimes it works best when you have a vision to set the destination, sometimes the vision develops on a journey with no determinate destination, and sometimes the journey becomes the vision..........keep carving and painting, sooner or later it will make some sense, kind of. I am pretty sure the giants of the past, who carved actual gunning decoys, like the Ward Brothers, Elmer Crowell, Shang Wheeler, Charles Perdew, Thomas Chambers, John R. Wells, Ben Schmidt, etc. "just did it". They might have had a vision and style, but they didn't obsess much about them or a lot of the stuff we worry about. They just tried to make the best decoys they could and meet their customers' demands and orders.