Ha! Scroll back up, I JUST added a paragraph talking about that! What timing.
The tiles on the wall made an enormous different overall, but what I added above explains the bass traps which really helped. Also behind me is a large craft table and small bookcase with cloth storage bins, etc. So while it's an 18' room behind, there are tons of objects breaking up standing waves. When sitting at my mix position, it's surprisingly nice now, and believe me it used to be a horror before the room treatment. That is mandatory in a weird space like mine. Oh, and also the extensive Neumann calibration process is a big part of it. Keeps me from having to measure nodes and anti-nodes and manually trying to EQ the space. Sonarworks would be my choice if the Neumanns didn't come with a solution.
This shot shows it a little better... I have the acoustic tiles on the left also. That really helps minimize corner problems:
BTW, under the speakers are 4" tall yoga blocks which are dense foam and cost 13 bucks for the pair. I never heard of them, someone suggested that when I was blabbing about having to spend a tom for acoustic risers. I love cheap hacks that work, lol! In fact, the stands are a slanted shelf leg from IKEA and I bought two wood cutting boards from Amazon and screwed them in place. What's nice it the stands have a locking nut so while they are mounted tight to the desk, I can rotate if necessary. Yay IKEA.