ORIGINAL: TFOX
The problem is the form not the draw length,you don't fix form with a draw length change,it might/can help but doesn't fix it.You have the exact same problems with both draw lengths.
I agree. I think the front shoulder is too "bunched up". It looks like the left shoulder is too high, like you're shrugging with the left side only. You need to get that bow arm extended a little and lower the front shoulder. If you do this the 27.5" might be the right fit.