At the moment (December 15, 2024), I have a suggestion for a future update.
When we have a character that's overpowered (current keeper is at level 266) we can convert excess sensitivity and perk points into arousal/energy/spirit points. Or, use them as currency to gain overpowered rune/accessories that's not sold by the golden mimic. Or maybe use them to buy special perks for facing the demon queen herself.
This is from the assumption that the demon queen will be at level 150 on easy (level 400 on hard) and there will be no new game plus.