It would be great to be able to create a new character that can completely skip the campaign and basically just levels entirely in monoliths.
The benefit for players is quick testing of build ideas without having to regrind the campaign each time. For example I want to make a fire aura build but have zero interest in going through the campaign again after having made several other characters and running the campaign. So my fire aura build idea will have to wait until I feel like regrinding the campaign which may be never.