He is , but i think the question mark will be removed if he wins the champions league with us or later.
Mainly coz i have seen it being attributed tk the playeta he had at barca with messi, iniesta and Xavi
As long as he's in charge of a contending team, he has a good chance of winning. Sometimes, you lose in the UCL because of bad luck since it's a 2 legged tie. Bayern outplayed Atletico in 2016 and would have gone on to win 99 times out of 100 had the tie been repeated. Missed penalties. Posts. One on ones. But that's football.
Last year could have gone differently had the Sterling goal stood because we would have been favoured against Ajax.
It's been disappointing in Europe since Barcelona for Pep, but the Champions Leage is a very difficult trophy to win. The stars have to align.
Let's see what happens over the next 2 years.