Compared to most games, Trail of Cthulhu is hardly complex mechanically, but for the past 10 years I’ve increasingly preferred simpler games.
(There’s a limit though. Completely freeform, stat-free games can be fun as one-shots, but they leave me hungry for something, anything, to study and ponder at the table.)
This is Crypt of Cthulhu, a hack of Trail that takes some inspiration from Cthulhu Dark and Barbarians of Lemuria, but also standardises some of the traits in Trail. I think it works surprisingly well.