The mod The level of statistics is equal to the core amount. For example if your dead eye core is equal to 0 your dead eye bar would be at level 1. You can see how it works on the images I provided above.
Why? In the base game leveling of abilities feels slow after your first playthrough, this mod makes it consistent across all chapters and adds a downside to not eating or resting
Future I don't think anything would be added to this mod, cause all my other ideas for mods are in different direction then what this mod is about.
Special Thanks to AviWind01 for his open source mod which helped in making this mod