The cherry on top of the cake would definitely be a calibration screen mode. Imagine, the transparent plastic cover is off and you push a small calibration push-button. The regular screen statistics disappear and you get a full 32x24 pixels thermal camera output. With this, you can calibrate the positioning of the thermal camera to ideally cover bare soil and plant canopies.

This is (apart from adding a push-button) mostly a software project and I think I can find some inspiration in all the open source thermal camera projects presented on this platform.