That's the power of a finely-tailored suit, my friend. Be bold!
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I think the natural shoulders are a great look. These adjustments will possibly fix the appearance. With regards to the shirt collar, it may benefit you to use a double button to raise the collar. It will work well with the higher knock on the jacket. I wouldn't go too high though.
Thanks for the feedback, B. I'll keep it in mind! The jacket actually is a 3r2/2.5, the pics may just not have caught it at the right angle to notice.