I'm certainly anxious to hear from Alan and get his input. I could see adding an inch to the width of the body but I wouldn't want to change the chest and shoulders. The pattern does have a dropped front, like an Aero 30's HB so I suspect a full 2" increase would be too much. My HB is 26.5" in back and right at the edge of almost too long in front. Suddenly my head is spinning so I think parking on it and getting feedback from his point of view, rather than trying to guess my way through it is a good idea!The test jacket as it is now, fits well enough that anyone not registered here would buy it at once, just as it is and not give it a second thought. So, whatever adjustments you decide for, it will be a great jacket either way. The only thing you should not do, is ordering it too tight. As you mentioned, Alan is quite strict with the "customer is king" policy. He allows you to ask for pretty much any change that comes to your mind and will not argue with you if you go against his advice. I'm telling you this because with my first Order there, I got the fit jacket and I went full ham on narrowing down side panels. Alan was like "1" on each side off" and I was like "nah make it 2"!" Yeah, guess what, I didn't hit the gym for a few months, gained 10 pounds and who's wearing my jacket now? Yeah. That's right. My little brother. Lesson of the day, Never go full retard on the tight fit quest. Or as Fanch uses to say, a jacket a bit too wide will make you while a jacket a bit too tight will make you .
Personally, I think the sleeves look good length-wise as well as wide-wise, you fill them good enough to look a bit bulked up in them, a badassery I quite approve of, rather than the sleeves looking too wide, but sleeves are a very subjective thing, so do as you think, it will probably be good either way.
Regarding body length, I believe to see it covers your belt and I don't think the style looks as great when it's much longer than that. I would add maybe 1" but ask Alan to make the back a tad longer, like on the Vansons Chopper or Model A (a drop?).That way it looks right from the front and you csn still bend forward without the jacket riding above the belt at the back.