There are a lot of things in TRoS (and TFA) that connect to old Legends stories; Sheev being able to lightning a fleet, Sheev returning as a clone, Luke’s nephew turning to the Dark Side and killing his fellow Jedi in part because of Vader’s shadow, Sheev having an extremely powerful grandchild, Luke’s female Jedi student (Rey/Jaina) having to kill the fallen male student (Ben/Jacen) who she has a strong bond with, a large fleet built by the Empire and secreted away as a contingency plan, Chewbacca (almost) dying.

The problem is put them all together and they add up to one too many, Sheev lightning the fleet is that one for me.