Thanks for a really thorough review! You ran that pack through its paces.
I had the 2nd or 3rd iteration of this pack and really appreciated its capabilities for the price. Your load recommendations seem spot-on; I was able to use my pack on 5-day summer solo trips in the Colorado mountains (no bear canister) with 30 lb max. load comfortably. As you mention several times, fit is absolutely critical to pack comfort. As always.
To be fair, I work for REI and am glad to see them continue to create innovative, high-quality, affordable pieces of gear for folks who are shaving weight but are unwilling to commit to more expensive products.