Have you brewed the recipe you posted? Since you are considering entering it in competition I assumed it was a brew you made and thought highly of. Either way it seems in the ballpark of a solid oatmeal stout. I would brew it then carefully compare it to a highly regarded commercial example, preferably one you can find out the grist for, you can look up what is considered a good example of the style. Take notes and if you feel it’s lacking in any qualities like mouthfeel, color, roastiness etc. adjust from there, maybe ask questions here about best ways to get from point a to point b. It’s a great way to learn about ingredients at the experiential vs theoretical level. Have fun!