What would happen if Celestia and Luna's human counterparts gained their equestrian counterpart's abilities to move the sun and moon.?

[Newman1651 35]

Whatever the outcome may be. i feel the implications and consequences will be very apocalyptic.

[heavens-champion 1,907]

(look of pure horror) No mortal being should have that kind of power. 

[HeavenSunset 1,874]

They would get overwhelmed by the magic and turn into villains