Instead of adding sugar, I would just mash lower. I love the flavor of MO, and I would hate to have that diluted in my brew (were this my brew).
I'm also a huge believer in the First Wort Hopping method as well as lots of late hop additions (which you have obviously). Personally, I would FWH instead of doing a 60 minute addition. You'll get a smoother bitterness if you do.
Otherwise, that looks good to me. Let us know how it comes out.