I’m really hoping that Crate or a community member develops something like the very well received Synergies Mod created by Salan for Torchlight 2.
This mod has many great features and is a collaboration project by a small team of community members. It features lengthy end game progression dungeons that scale in difficulty with the number of players in the game. The system works much like raiding in many MMOs today, where loot that drops from one tier is used to progress in the next tier. The mod also provides additional difficulty options, classes, items and side content such as endless dungeons.
The addition of this as a mod to Grim Dawn would create continuous progression for the end game PvE oriented community while allowing input from players who are drawn to this sort of game play.