^^^I don't really see where Gurney is a character that needs to be played by Patrick Stewart again. We already got a different actor in the miniseries and it worked out fine, and it's not like the role is associated with him the way roles like Jean-Luc Picard, or old Charles Xavier are.
This. Hell Gurney's appearance was little more than a Cameo in the original 1984 Dune. Do we really need a cameo of a cameo here?