The button stance is rather low already, much lower than other jackets I have, and both my tailor and I decided to make this jacket shorter by exactly half an inch compared to the previous one... maybe a robopose with arms down would help to better judge proportions
Button stance is fine/good. But the space between the top button and the bottom button seems a bit squeezed (prob. due to a combination of lowering the button stance and shortening the jacket length). For my eye, I'd restore the prior length, but keep the new top button position, and lower the bottom button by the same amount as the restored jacket length. But as long as you're happy with the new length, all's cool!