Well you do defeat the big bad at the end. The fate of that NPC doesn’t constitute a cliffhanger for me.

More importantly: all features were done. Personally I don’t really care about the story in ARPGs anyway.

Grim Dawn was completed before the devs started releasing DLC. Last Epoch, apparently, still has severe bugs and unfinished content.

Additionally 2 of 3 DLCs in Grim Dawn are more akin to olden timey expansions rather than modern cash-grab DLC.

Loki is another ARPG. Titan Quest is definitely the better game, but in Loki you actually get to choose the god you are associated with.