Thanks for the welcome and quick reply.
The room is 20x15x10 and tiled. The entire setup is to the left most side of the room, next to a sliding glass door. So if facing the TV, sliding door > sub > L main > tv stand with center > R main. The mains are not toed in, just facing the couch straight on.
I'm thinking of some decorative pads or at least an area rug to start for sound treatment. The room is not ideal, but have to work with it for now.
Yes, would love to get more bass in 2.0 mode until I get a better sub (suggestions are welcome, in fact, solicited.) I also tried with subwoofer, LFE+Main, crossed at 120 and the sub did not cut it.
I'm in Chino Hills, CA.