Only one person used a MLD Burn this year that successfully thru-hiked the PCT. That was Lint. Who was on his 13th thru-hike if I remember right. He started May 19th, same day I did, and was doing 30's pretty much right off the bat. I only saw him for the first 3 days - as I was doing about 27 mpd right off the bat. ALL the weight will be on your shoulders - which may be annoying.
I used a MLD Burn for the AT in 2011- the bag is great, but VERY small...I went stoveless when I carried that bag. IMO It would be way too small for the amount of food and water needed between the large sections on the trail. It also isn't very comfortable when loaded over 20 lbs. -- I'd carry a MLD Prophet (AT THE LEAST) since it will be annoying having a bear canister (even empty) strapped to the top of your pack -- if will put a lot more weight on your shoulders.
I think you'd be much more comfortable carrying a Zpacks Arc Blast, which is what I carried for the PCT this year (minor weight increase compared to comfort) and you'd be able to keep a bear can inside the pack. You could also try the very comfortable HMG Windrider, ULA OHM, or GG Gorilla.
Your tent set up looks very dependant on finding trees, and while it may be fine for the desert -- you'll likely need to beef it up for the sierra's, and certainly make it rain/wind stable for Washington. If you don't use trekking poles - sticks are possible, but will limit where you stay each night.
Overall I'm sure you'll figure it out - and your lightweight list looks good. Enjoy the trip and have fun !
Here is the link to my gear used this year: http://www.backpackinglight.com/cgi-bin/backpackinglight/forums/thread_display.html?forum_thread_id=84760&skip_to_post=724865#724865