I want to run Out of the Abyss again, but this time use the new Ravenloft rules instead of the DMG madness rules, and the companion rules from Tasha’s. Give each player one of the NPCs including their secret and let the players run them.
I'm currently running OotA & I do think there are too many NPC followers. So may that the party didn't interact with them unless I initiated something. I gradually weeded them out and we are finally down to just 1.
I'll eventually let the players know that they missed a bunch of content because they didn't bother to interact with any of the followers.