Opal's mom mentions you pursuing Opal in a relationship during the wedding (to which you respond "it's complicated" on the harem route), and that got me thinking: is there an Opal route for if you didn't choose Korra or Jinora at the choosing stone?
Also
Fufkcace, my estimation might be off, but I feel like there's enough content in this game that, if you take your time on each chapter, or heck even complete both the Slave route and Love route for each chapter before continuing on, you should be able to start the game and reach endgame by the time the next update comes out. If you time it right, you would be able to play the game all the way through without having to wait,