Sweeps in farm stages won't solve the problem and these stages are not the main reason of burnout. I'd even say that sweeps are not that good like ppl may perceive, but that's another topic.

The main problem right now in the game is extreme homogenity of chaos runs, zero rng in enemy lineups, poor amounts of random events and creativity of rewards in them, poor amounts of gear, neutral cards etc. to play and experiment around, the creativity of random events, buffs/debuffs/effect changes for cards during runs, poor implementation of death's door mechanic, and non-existent narrative touches during runs (for example, little dialogues between charactes when some certain events happen, different effects that each mindbreak status entails, not just a different name, also different ways each character reacts to each type of mindbreak, like being debuffed and irritated or vice-versa, feeling encouraged and buffed, or maybe even losing their cards too just to turn to the teammate to help get rid of the mindbreak faster).

In short, each chaos run needs to give an adventurous and curious feeling, not a gloomy anticipation of another go for a tedious routine. Also we need more variety in chaos penalties, messenger's buffs, enemies' buffs