7290824
Whats more iffy is that Faust's idea didn't mention Luna's fate at all there.
Like we don't know if Faust intended for Luna to step down too or would she co-rule with Twilight.

7290828
Most indeed a good point, that also puts the theory into question cause there was no mention on what Lauren meant for Luna. I felt like the idea is marred by the absence of how Lauren would've handled things.