My request would be for an aluminum clip on top that could replace the soft touch plastic top. I’m currently using FLIRC cases for Pi 4s running scientific processing (boinc rosetta@home). Since all 4 CPUs run 24x7 (And I have them over volted and over clocked to 2100), it can get quite warm. Removing the soft touch cap knocks about 10c off (70c to 60c) and just resting a heatsink on the top (on old Thermaltake volcano 6cu) takes off another 8c. I imagine a clip on, small finned, aluminum top with a little cheap thermal paste would keep the temps around 55c passive and much less if you pointed a fan at it.
Here is hoping someone reads these posts!