I'm going to be harsh because mens formalwear really hasn't changed in the last 100 years (especially compared to women's fashion) so it needs to be perfect. The construction and choice of materials are poor. You need to pad the lapel and use more interfacing in the foreparts. I also find the gap in the front rather distracting, you should remove the loop and put in a button hole. Lastly, you should stay away from polyester satin, use a superfine wool flannel or another natural fiber.