I think it would be cool to see more development being made in the complexity of the engine and transmission systems. I feel that with the game trying to achieve maximum realism, it should lean more towards how the individual components and systems react, rather than "Engine + Level 1 Upgrade = More Power & Cool Backfires". I'm not saying the developers should implement a full air flow and combustion simulator into the game, but more on par with other driving simulators that are currently on the market. I have attached a screenshot showing an example of how I have my stock Grand Marshal engine set up, and then a screenshot of the available parameters you can modify with an aftermarket engine and transmission controller. Another item on my 'wishlist' for the game would be transmission thermals and driveline efficiency. This may be difficult to develop on a case-by-case basis, but I'd be willing to help out your programming team and provide examples for things like spin-loss, torque converter efficiency, inertia data, etc. Thanks for making such a great game!