If for example you can't get into the car park during the off peak hours I would say there are no off peak hours.
If you can't find a seat during the off peak hours I would again say there are no off peak hours.
I could go on but I guess everyone gets the idea. There is plenty of time for new routes but 2016 isn't the time as I would say the airports capacity will be lower than 2015 and 2015 was a bad year for passengers.