I think the recipe looks good as is. Making it more bitter is unlikely to improve it. I understand wanting to experiment, but the beer looks like the bittering/specific gravity is already leaning towards bitter and adding more hops probably won't be good.
To liken it to Emeril, if you're making spaghetti sauce and 1 teaspoon of oregano is good, 6 teaspoons won't improve it. It'll just make it taste more strongly of oregano. Same with more bittering hops. It'll just make it more bitter, not better.
I'd make the recipe as is, and when it's done, you may want to use some of the centennial for dry hopping instead of, or in addition to the 2 ounces of warrior.