I don't wanna be rude but, why even add Gen 8 ?
I'm trying to understand what the goal is, if it's fixing / finishing the current game then it would not make sense.
If Gen 8 is added, I hope the new mons are worth the wait because, lets be honest, there are already enough mons and encounters start repeating a lot.
"Reworking old content" Why? Just finish the game and then do a bigger update fixing major problems.
Sorry for being straight to the point.