I used a delay plugin to add some filtered echoes just to the middle by disabling the right side input.
In the next insert I used a distortion on just the right side. This brought out a lot more of the reverb than was heard in the original loop.
A good explanation of mid-side processing, and a few off-the-wall suggestions to try. Not just the usual tricks.
I’d just be careful about unlinked m/s compression. Too much movement can make your stereo image expand and shrink in uncomfortable ways. Although, maybe that might be appropriate for your music.