You can start by cutting the bittering addition in half. Warrior is an aggressive hop and 1-1.5 oz. would be sufficient. I would think about doing three Centennial additions, maybe 1.5 oz. @ 20 min., 1.5 oz. @ 5 min., and 1 oz. dry hop. "Hoppy" isn't so much about bitterness, but about a balance of bitterness, flavor and aroma. Your hop schedule as it is now would make for a very
bitter IPA with tons of hop aroma but mild hop flavor.
Also, I would think about a blend of crystal malt to add some color and complexity. Maybe .5 lb. of crystal 20 and another .5 lb. of crystal 60 or something like that.
Finally, make a starter with your liquid yeast. That's a fairly big beer and a yeast starter would help immensely.
That's all I've got. With a couple minor tweaks you'll have yourself one fantastic IPA.