Airy, I am quite sensitive to over cooked photos and I do not see that with your image.
The bokeh indeed seems very temperamental, which isn't all that strange. The 50mm f/1.2 can easily produce some of the most nauseating results when the wrong choices are made as well, despite how much I generally love it's bokeh. I would still be in line to purchase a 28mm f/2 if I hadn't recently tried a 28mm and realized I want wider.