You have already received a lot of suggestions. I agree with moving the speakers forward and keeping your acoustical panels lower toward the midwall area where your ears are situated. I don’t recommend buying any new panels. I do recommend using a different sequence.
1) On your side walls interleaf your panels so you have an absorber, then a diffusor, then an absorber, etc.
2) Do NOT mirror the walls, do the opposite. If you have a diffusor on the left wall place an absorber directly opposite on the right wall.
3) I have an "acoustic recipe" diagram in my profile that illustrates this. It would probably take an hour to reshuffle your panels, its free, and you should notice the difference from the first note.
4) You may want to get a small folding chair and simply test moving your MLP forward toward your speakers. If you find a spot you prefer THEN move that big comfortable recliner.