not really interested in the mod right now but I will definitely support this if you make it like the dark souls bloodstain mechanics

ie : when you die you have to go to your corpse to recover unused EXP (you never lose the EXP used to level up your stats though) and IF you die again before you can reach the bloodstain then a new bloodstain appears and the former one is lost , which means the EXP it had is lost forever

as a Dark souls veteran, believe me this system will create true fear of death :D