I'd like to see the interior mounted light bar from the EJS Luminator Concept in 2017, and Nacho Concept in 2018. It was produced by Automotive Lighting as a concept, but could see production.
Dual Batteries for the diesel
Larger OEM tank replacement
AUX fuel tank for both Petrol and diesel that goes where the spare tire is. Similar to a LC or 4R unit from LRA.
Snorkel for the diesel
ARB twin compressor mount under the hood for the Diesel.