Some updates:
Sad news... most of my rics melted... I'm inclined to believe that the intensity of the LEDs have something to do with it. Just shifted the remaining ones to a shaded area to test this theory. Before removing the light diffusers, my yuma was doing ok. After removing them, the yuma started to pale in colour. Also shifted it to a shady spot. Will be putting the diffusers back on to see if it helps.
On a lighter note, I think my Yashias are really paired up! After the major re-scape, they got separated, each hiding in a different spot. Just this week, they got back together again! Both would take turns poking their heads out of the hiding spot. Very fun to watch.