If all check-in will be online, with they be extending the period so that people can check-in further in advance? Jet2 allow check in up to 4 weeks prior, but the FR website says the limit is 14 days (which must have been extended because last time I travelled it was only about four days).
If going away for a couple of weeks it's tricky to be checking-in for the return flight on the same day you are departing!