This can be a wishlist too. There are addons available from Cessna, Piper, Beechcraft to Warbirds simulated by developers regardless which better than what as there have been more GA's than jets lately (in real world too). To my preference, I'd like to see a refinement of Britten Norman, the existing one is very good, but a more detailed exterior model would be just great. It is simple yet robust, so I dont think deepening the sytem wise is needed (?)

If you are referring to the Britten-Norman Islander, I seriously doubt you will get a much better exterior model than the Flight1 version unless you do it yourself.