It sounds like the modifications made to the Case IH Magnum MX in this mod are aimed at improving its performance and appearance. Hardening the suspension to prevent the wheels from fitting into the fenders is a common issue in heavy machines, so it's great that this has been addressed. Widening the wheels can also help improve stability and traction.
Adjusting the brakes and gas pedal behavior can have a big impact on the driving experience, allowing for smoother acceleration and deceleration. Removing the square front fenders may have been done to enhance the overall look of the tractor, giving it a sleeker appearance.
Improving the gearbox is crucial for optimal performance, as a well-tuned gearbox can enhance efficiency and power delivery. These enhancements can make the Case IH Magnum MX mod more enjoyable to use in the game. It's great to see modders taking the time to fine-tune and improve existing mods for a better gameplay experience.