Does he need to kick the weed habit?
I believe he said he became a pot head while making Zak and Miri with Seth Rogan.
The movies have been steadily going downhill ever since. Red State, Tusk, Yoga Hosers. Each one worse than the last. Maybe the weed has not helped his judgement or discipline as a writer. Others have shown they can handle it, but it might not agree with Smith. Could he be using it too heavily, at least as far as his writing is concerned?
Just my completely uninformed speculation.
-I was born in a crossfire hurricane.