A step to separates might help. However, judging from your photos I question your application for the GIK panels. It appears you have a total of 6 panels, 2 on each wall and two on the ceiling that are tightly spaced together. I suggest a looser spacing on the sides and remove one or both from the ceiling. Also try a different ceiling position somewhat over the speaker position. You might find the missing air/dimensionality. Good luck.
Speakers or Amp
My current amp is a Jeff Rowland Continuum S2 Integrated amp. My current speakers are Aerial 7ts. I have an opportunity to change one or the other. I can go from the Continuum S2 to the JR 625 mk2 with the Capri 2 preamp or from Aerial 7Ts to Raidho C3.1s. for about the same cost. I'm try to improve spacing between instruments and add a little more air. Looking for feedback from anyone familiar with the aforementioned components or general thoughts regarding the best option.