to the 2 sun thing on dreanor. I mean it is plausible to think that the sun really is some god of light or something, worshipped by the apexis or something.
maybe we dont see 2 suns on dreanor because void shit blackened it out or something?
I am not saying that i am convinced of either side of the argument, i just want to clarify that if blizzards wants OP's story to happen, there are a bunch of ways to explain it without retconning everything.
And honestly I like OPs idea, I think it makes K'aresh more connected to the story of warcraft and also to find a reason why we would even go to the homeplace of the ethereals in the future.