Excellent photo! Qualitatively, a very good shot and the shooting angle!
On a jacket: it can slightly adjust the tailor? I think, make a shelf on the chest a little narrower. The width of the arms a little wider. Then the folds of tissue will not.
There is another option - to make a shelf on the chest a little wider. Make coat "draped" over a wide option.
This is just my opinion. Good luck!
It's a thick cashmere, but yeah, it could've probably been tightened