Janky might be an overstatement, but they’re nowhere near as tight as the controls of a Mario game for example. (Then again, neither are the controls for Psychonauts 2.)
My best guess is they shot themselves in the foot by promising certificates hand-signed by Ron Gilbert, and then accidentally selling multiple thousands of boxsets.
Unceremoniously pushed back again, to 2022. I prefer to think @Laserschwertfound a subatomic flaw in the box art and halted productuon by heaving his body into the gears.