I think their lore is awesome, I think everything about them is awesome. I love these huge, infinitely powerful primordial intrinsic forces of existence that go around ensuring that reality is never dominated by any one of the cosmic forces, and that they are all in harmony and balance.
Their architecture is beautiful too, Neo-classical space sci-fi themed is just epic. The Keepers are awesome. I love them all, even Loken, bring him back. Archaedas should be revealed to have only had a construct of his namesake defeated in Uldaman so we can have him around again. And bring back Mimiron. Lorewise the idea of massive constructs being molded from the planet’s crust that was scooped out by the Titans, then sent immediately to war against the Old Gods is peak. Them being given dominion over all the forces of Azeroth and other cosmic forces as well is also peak. I love when they battle the Elemental Lords using the element’s own powers but their authority granted by the Pantheon makes them absolutely unstoppable and they seal them into prisons they made called the Elemental Planes. I want a cutscene where Odyn is blasting hundreds of thousands of C’thraxxi with his 950 trillion Amp Thunderspear, Mimiron (original keeper form) probably has laser eyes or something, Loken I imagine has lightning fingers like from Star Wars.
Lastly the Constellar. I want to see Constellar Dictates and Designates. Ideally in some astral command locus, with entire galaxies projected where they can control them from. I want to see one arrive at Fel, Order, Life, Light, Void corrupted worlds and just nuke them. Give us that “entire planetary systems born and razed in the time it takes your mortal hearts to beat once.” action.