Appreciate all the info, love the 60 cube, used to have one myself back in 2013.
You have 2 issues that standout right away.
1) Your lighting isn't providing enough blanket coverage. Leds require a large area when growing SPS and it doesn't matter if they're right under the light, they still get shaded. You would benefit greatly with the T5 fixture that has a couple of bulbs on each side and the Radion in the middle.
If you want to stay LED only, you could put a couple of LED strips on each side and angle them about 10 degrees inward.
2) Flow. Your 2 MP40s are great and it's better to go too big than not big enough. Placement in a cube is tough to get the right flow. I don't think your current setup provides alternating flow. If it were me, I would leave the MP40 in the back where you have it and I would move the one on the side down below the Acro about an inch or so. That way you'll have flow moving front to back and then side to side, but the side to side will cover the middle and bottom of the tank. Lowering the side MP40 will also allow it to nitninterferenwith the back MP40 flow. As it is, they intersect which isn't good for flow. The side one is right on the SPS too which is too much for it.
3) Gyre mode, I like, but it's probably a bit much for a cube. I run my rear MP40s on Tidal Swell in the day time and Lagoon at night. I run my side MP40s on a mixture of Reef Crest, Tidal Swell, and an hour of Gyre in the day and run Lagoon at night on low intensity.
4) When you add more lighting if you do, you'll want to increase your Nitrate to 12 to 15. You could do that now actually and it will help with color. Your phosphates are fine.
Hope this helps and if you have questions just let me know.