No game is perfect and so you should not expect your mod to be. Every game has its limitations and so will your mod.
For example, Pre 1999 games only had ugly non 3d graphics and yet they include some of the greatest games of all time. Even with your mods liminations, I for one, would like to play it.
And as for realism, until more powerful computers were developed, realism has always taken a backseat to hardware limitations. In your case you have adverse code to work with. But that doesn't mean you can't succeed.
Good luck m8,
May you one day receive the inspiration to finish your project.
