Yep, could have been good. Sadly, we got… what we got.
That’s a cool idea. Honestly you could’ve had something similar to what was already in the films. The First Order could’ve been your Imperial Remnant, fighting with the New Republic, then a Sith Cult out in the Unknown Regions introduces a new threat that brings the two factions together. Maybe they wanted to resurrect a Sith Lord and begin a new Sith Empire. Could’ve been Sidious, or Darth Bane, or a brand new guy.