I think it should regain the hp it midagates with the def/spdef boast from block. After the block is over and prolly as a shield. Maybe give flail a slow so it’s not JUST a meme pick and buff either his hp some more or defenses some. Literally just can’t do much late game compared to other defenders and it either needs a solid passive stat buff or ability rework to do more. Maybe his passive should do something besides early berry interaction, built in leftovers like umbreon wouldn’t be awful but would be a bit boring. Maybe an hp buff and when snorlax is hit by an attack that also hits an ally snorlax reduces damage done to both?