Sometimes too much can be beautiful. This donut just wouldn't be the same if it had a conservative amount of icing and sprinkles. Pile it on! No regrets!
When I was a kid my mom had a cookbook all about how to make creative cakes with nothing but a round cake pan, a bundt pan and a square pan. She made caterpillars and castles and Snoopy and all sorts of amazing creations but I don't think I ever saw a donut. It's so simple it just slipped under the radar.