I think Champions League is a far off dream for the balugrana this time around, with no quality squad depth to compete with the likes of madrid, and seeing how the premier league clubs have strengthened their squads and bench, it seems they can even put up a good fight with general UCL giants, which was not thinkable for any PL team apart from Chelsea a few years back.
All in all, it would be best if barcelona set their sights a little low and aim for either league or UCL, and not aim for treble as expected of barcelona.