I don't think the surprises were only for the champions league but also in the premier league everybody nobody would have believed that Arsenal will win the premier league and they fucked up along the line, and manchester city has taken advantage of all situations, and been the first time of winning the champions league, what got me angry is the fact that inter Milan, lost too many opportunities to have lost the champions league.
Last season, there were indeed those who felt disappointed and happy about the title won by Manchester City and Arsenal's failure to win the Premier League. But basically they all fought according to their abilities, including Inter Milan's efforts in the Champions League even though in the end Inter Milan did not get the title there. I also agree with what you said where the surprise is not only in the Champions League, but in other leagues it can also happen next season.