Hardcore needs some buffs

We all know about hardcore, a locked hard difficulty where if you die, you delete the world for good, now its a extremely easy mode if you know about Minecraft mecanics, my idea is buff the difficulty, heres is some ideas: 1-.make more expensive the upgrade and enchanting weapons, like 50% or 100% of his original price. 2-.no chances to get a zombie villager, to avoid exploiting and using them to get full diamond armor when starting a hardcore world. 3-.giant upgrade to mobs, like zombies, skeletons, pillagers, etc. Make them more strong, more precise when tracking and with more hearts. 4-.a more stronger effect on mobs reinforcement: increase the chances to spawn more mobs when youre attacking one. 5-.less regeneration when eating food, taking potions, etc: decrease a 50% the speed regeneration in all type of foods, incluiding golden apples and potions. I dont know if this feedback is gonna be popular, but i think its a great idea make hardcore a difficulty that makes honor to his name "HARDCORE" hope you understand about my idea and hope you like this, its my first feedback so maybe i miss some things. Bye :D