The main selling point should be the awesome dual class system. Ever wanted to use EDP and Ignition Break on the same class? Or No Limits + Rampage Blast? 16th Night with Warlock? There's a ton of fun combinations to try. Of course, they're balance changes so nothing gets too crazy. Complimented with a PoE-style loot+upgrade system, it's easy to get tons of good loot to make cool builds with. The rift system is just like the Solo Leveling manwha, it adds a lot of variety to leveling.