Just a comment on your dilemma:

I had a similar problem with a Marmot fleece, a large size which seemed a little tight-fitting. After losing about 10 pounds on the C2C, I was very happy with the fit, although it still seemed more like a medium size.

The other day, I was in a local sports store checking out a Mountain Hardwear Conduit jacket for LDPs, so I tried on a couple of their fleece jackets to check the size. The large sizes definately seemed more roomy than my Marmot fleece, so I am puzzled that you have a problem.
To finish my story, the conduit jacket in a medium size fit me quite well, but I decided to re-waterproof my old Jansport which I love.
The MH jackets are really nice, so I sympathize with your plight.