This modpack only gives additional client-side only features for redstoners, builders, and ordinary Minecraft players. It will also bring performance improvement mods that don't affect the game.
The only two mods which have to be server-side in order to work are Simple Voice Mod and Inventory Sorting but it's not mandatory you can keep playing on vanilla server with this modpack.
It also provides some resourcepacks and shaderpacks, feel free to add more, and/or suggest more.
PS: Don't forget to update your settings before starting a new game.