Yes, Grim Dawn is fantastic, especially if you enjoyed Titan Quest and want more. HOWEVER I don’t believe that it’s from the same devs. Where did you hear this?
I can see that Crate Entertainment licensed the engine from the original Titan Quest team/publishers, but I see no evidence that this was developed by the same people as Titan Quest.
Thanks for pointing that out! I was looking for an original source, but the articles Wikipedia uses as sources are from a defunct journaling site. However, you can see at least one of the original articles through the wayback machine.