Lanefan
Victoria Rules
I don't mind revival from death being part of the game but I don't want it to be automatic and I want there to be consequences. 1e has a "resurrection survival" d% roll based on the character's constitution at time of death - the odds of making it are good but not perfect. 1e also has it that coming back to life costs you a con point, so this roll gets slowly more difficult each time you try it. Both good mechanics easily ported into 5e.