I like the script and have been using it for a while now and it really helps but i have some suggestions, i know the cases are pretty specific and not always present but if playing on some servers the things below do occur (in mass).
-Books on Enchantment Tables
-Beacon beams
-Block Entities
-Minecarts
-Skylight
-Particles
-Armor Stands
maybe head textures? (idk if its the texture that causes lag or just the head itsself)