-Bad gas? run a tank of name brand high octane (Shell v-power I prefer if avail) see if it clears up.
-Possible bad injector? Theres been a bunch here including myself. Wont throw a code right away and when it does, it will go away shortly after.
Note: This thread began over a year ago.
Both the 2016 2.4L and 3.6L have a software update bulletin that specifically addresses slow, rough idle (the 2015s do as well).
As per the U.S. Extended Federal Emissions warranty, the PCM software updates should be covered for 8yrs/80K miles. I am unsure of the Canadian coverage. Check with your dealer: