The biggest change is that you get more health and max weight per stat invested. Limit how many points you invest in vigor and endurance if you want to retain a higher level of challenge. The damage and scaling from Str, dex, int, fai, arc is unchanged and the damage from monsters is unchanged.

Stats changes :
HP = 300 + 50*vigor
FP = 40 + 5*mind
Stamina = 80 + 2*endurance
Equip load = 30 + 3*endurance
Item discovery = 200 + 1*Arcane
Poise for all armors : x5
Block Stamina Cost: x0.5
Weapon upgrades cost 1 smithing stone instead of 2/4/6

QOL changes :
Weapon grease duration x5 (excluding drawstring)
Weapon spell buffs duration semi-permanent
Furlcalling finger remedy gives 0,1% HP/s and 1% FP/s semi-permanently.
Equip load bonus from charms : x5
Crafting yield : x5
Merchants that sell [Larval Tear][Rune Arc] have unlimited stock
Cursor moves 50% faster on the map
Lost rune pickup range : Almost unlimited
Item/loot pickup range increased slightly (should fix obnoxiously hard to pickup items on sarophagi)

Installation :
Backup your regulation.bin file. Paste the mod into Game folder. To uninstall, revert to your backup.
Obviously you can't play online, this will trigger anti-cheat. Search Nexus mods for offline mode.

Made with Yapped Rune Bear following this guide : https://www.nexusmods.com/eldenring/articles/40
Do not ask me to update/change/customize this mod, it's extremely easy to make your own version if you follow the guide.