hiding the particles of Slowness 3 when down would be great.

Also, Idk if it's already possible but I would like to add a weakness effect when revived and hide the particles.
Like the command "/effect give player minecraft:weakness 60 0 true"

actually here are the effects I wrote in the config file but their particules are visible :
"revivedEffects": [
{
"effect": "minecraft:blindness",
"amplifier": 4,
"duration": 200
},
{
"effect": "minecraft:slowness",
"amplifier": 0,
"duration": 2400
},
{
"effect": "minecraft:weakness",
"amplifier": 0,
"duration": 6000
}
],

You should use the command /cmdconfig and change the stuff there. Update CreativeCore and PlayerRevive an option has been added. Thanks for your suggestion!