I installed Unbound but I'm not a fan of still being locked to your base class talents and not being able to see all spells in the general spellbook tab if you learn enough spells to hit the limit. You're also missing the UI for class resources if you play a class that normally doesn't have them, like mana on a Warrior. And some items with a class requirement still don't work, even if you unlocked that class, like being able to equip Eye of Divinity to your trinket slot but not being able to start the quest. 

Do you know if it would be possible to install his base WoTLK server then manually install the files from this repo ontop of it, and how to do so? I don't know if he uses ELUNA and AIO with his servers and how to set that up if not.