We're here too. Stayed at a airport hotel overnight. We bought a ticket for the airport bus at the ticket info desk at the bus stand at 10am today, 10 euros as you say, good value too. Nicely settled into to a nice hotel less than 5 minutes from the ticket pick up point & bus to stadium.
AEK are no mugs. Their performance reminded me of the Everton game last season by catching us on the break & being aggresive. Despite the defeat there's still plenty to play for & look forward to.