The gorge height was on purpose. How much do you think it should be lowered? How should I change the cut? These suits are for business, and I'm in a fairly conservative field (law).
The gorge is a matter of personal taste. So it is up to you. Regarding the trousers you should simply ask Patrick about the saggy back and it he can fix it with These trousers or if it would get better e.g. with flat front trousers.