While it looks good to me (I'd certainly drink it), I have a couple of issues.
First, I find the OG a bit high for a "session" beer. To me, "session" means an ABV no more than 3.5%; my session bitter doesn't exceed 1040 OG. (See recipe and thread
here.) According to ProMash, your grist will reach 1045 OG at 75% efficiency.
Second, I question the use of roasted malts. 2 ounces isn't going to overwhelm the flavor, and it'll give a nice red color, but it may very well have a flavor impact on such a simple grist. I'd knock it back to one ounce, just to be sure. You can also consider adding the crushed Chocolate malt to the top of the grain bed when you start sparging; some brewers report extraction of color and little to no flavor with this method (I've never tried it, but it sounds like it's worth a shot).
I <3 Willamette. Yummy, Fuggly goodness...
Bob