I will just repost and repeat that adding new modes that have no cross-progression with existing ones is bad. Without any fun motivation (not forcing) you can’t escape community being split.
And insted of ladder alike mode like Havoc, bring reimagined Twitch mode from V2, where you can crunch up sliders to modify difficulty as you want. And enjoy runs with x5 enemy HP and damage, x4 spawns, x10 bosses, x2 longer ability cooldown, etc.