I think it would be cool to add to this to modpack, in this way others would know on what modpack we're playing.
Example mod:
https://www.curseforge.com/minecraft/mc-mods/discordrp

As far as I understand this doesn't require any configuration to work, so I don't see why it should be included by default. Like 4rz0 said, just add it if you want.

I see no reason to add this into the pack itself. Feel free to add it to your instance, tho.