This is a proof of concept datapack that splits mobs up into two smaller versions upon their deaths.
This is done using the new minecraft:generic.scale attribute introduced in 23w51a.
Splitting also reduces the maximum number of hearts and explosion size of the split entities.
Currently only creepers and spiders split upon death, but this is easily configured through the
fisch37:splits_on_death tag.
I'm not sure if I'll do anything further with this pack, but feel free to use whatever you want.