>>31030969personally I found SM's plot to be kind of uninvolving and oddly alienating since the Lusamine thing didnt even have anything to do with me, and once she went to Ultra Space the player has almost no reason to go all the way out there after her. Basically I think if Lillie had her own team of Pokemon the player's role in the story would almost completely disappear.
Besides the player has been silent for 6 other gens and has driven the plot forward fine enough on their own despite that.