Do you think that if one of the other beta kids had touched the house juju they would of gotten a different power? Like maybe rose becoming omniscient, or jade being able to be omnipresent, and maybe Dave having complete control of the alpha or something time related

No idea honestly. It’s hard to say to what extent the Juju just empowered John and what are new powers. It’s sort of like the divide between Witch of Space and First Guardian powers for Jade, like, it’s dubious.