Here is another thought on arrangement.
From this pic assuming the top is north.
Lose the big cabinet or find something smaller for placement against the north wall between the dining window and the fireplace.
Take the couch under the right hand (east) window, move it over where the big cabinet presently stands oriented north to south.
Shift the bottom (south) couch over towards the window a little bit which now centers it in front of the tv and between the M80s.
Adjust all side table accordingly (e.g. if the long couch is too big to shift more towards the window, consider swapping the long couch with the love seat for direct in front of tv viewing.
This orientation will also remove the edge of the east couch from sitting in front of the right side M80.
