I have not seen a full game of him as a coach, and I don't know any of his players, but from watching some highlights, his team seems to connect well, the players relate to each other in a natural way and the movements are harmonic. I like what I see.
He may very well be top 3 in the world, we'll find out. If you claimed Pep Guardiola was top 3 in the world in 2008 you would be laughed at, luckily Cruyff believed he was and just one year later he was proven right. Some people couldn't decide before 2011 or haven't even decided yet, but that is just madness.
I was given this video in another thread which I started to analyze a bit but decided to not write about there:
The second pass was a pretty magical pass, perfect timing and with a surprising angle.
3:18 is another real through ball with the NT, through a couple of lines, and he had to really make that one quickly and with precision. The one after that towards Messi was great as well; lofted, and geniously finding him between the CB:s.
Apart from that, I didn't really see many "genious" passes there. There was even a corner in that video, lol. But please put some timestamps for passes you mean are particularly great, and let's see if I agree.
Most through balls he made are on the foot of players who have already started their run, and Xavi is looking in the same direction as the pass goes. He mostly has good marginal both vertically and horizontally when he decides to make the pass.
He was also good at playing the pass over the LB of the opposing team, he had perfect timing for those, but there wasn't really anything genious about them. Easily spotted from the TV couch.
Most of what made him great was his movement/positioning, his calmness on the ball combined with always keeping his vision up, and that he chose a 95% safe option 95% of the time. Of course he was technically great as well, so he could play safely on a higher difficulty level than most players.
Take a look at this game:
https://www.youtube.com/watch?v=6nhx6vEsQJM
I pointed before to that Pedro assist as one of his greatest passes, but I don't see that one, or any other pass he made in this video, as being speculative. Well, I counted 2 crosses, naturally a bit speculative... But if you put Pjanic in Xavis positions in that game he would unironically try 30 through balls