OK, I did some research about the front-back balance and - thanks to @Isaac Källström and @Robbie - decided to take on the balance issue first.
I shifted the balance 1" to the front, ie. I took 1/2" off the back and added 1/2" to the front, with the following result:
The hem is now slightly tilted to the front The issues in the back are looking worse now, partially because the shoulder pads have been removed.
What would you say: Stick with this balance, or try to go back 1/4"?