Except Savage coil gives you titles as your reward. Now if you were asking for titles as a reward (one title for each challenge-mode dungeon), I might be willing to go with this. Alukah makes a good point because yes, no one will bother with it if the rewards are low. If the rewards are high more people will want to do it but won't have the "skill" to clear it, leading to them complaining about the difficulty. I'll throw in that it also invites classisms and drama/ragequits. Can't say I look forward to any of that.
