Now that you have been in the room for a while, I am wondering how you feel about the sound with the 46" (or is it 47") Linacoustic down the sides of the theater? I am copying a lot of your ideas (along with others) for my theater, which is much the same size as yours, only I didn't have to use part of the room for the bath, and I don't have a bar. Instead, I went with a second row of seating.
I am at the point where I am debating with myself for the height of the Linacoustic, since, as you pointed out, if you leave it at the current height, it is only a bit higher than the "ear level" of a tall person.
I have also debated with myself over the way to cover the Linacoustic with the GOM, and how large the panels should be, etc. There are a lot of decisions at this stage.