Bobo and I have been critical of Xavi during the "we beat RM (without Benz lmao) we're back" honeymoon phase. Luck (which I underestimated), poor opposition, and the pre-winter transfer forced musical chairs didn't fool us. But Bobo and I were the most wrong as we were a couple of Xavi's biggest proponents to become our coach. If I knew Xavi's personality off the pitch and the football art he created as a player then I probably could've seen this coming. I assume the best in people especially our GOATS until they show otherwise. Solskjaer failed because he either didn't have the tactical vision or the ability to implement his vision, but he had faith in his players. The opposite is true for Xavi. Ironically amazed how well Xavi's been able to implement these no-faith tactics, it's up to the players to realize how rubbish they are and take action on their own. Of course that could lead to them getting Puiged.
Most of the posters here claimed Pedri as the world's best mid during our winning streak with Gavi not far behind when it was clearly obvious there some serious flaws with them both. Can't remember the exact words but Xavi praising Pedri similarly was another sign of trouble.
I am currently a bit less critical than you of Xavi, and was probably more assured than you that he'd be a success before he was appointed. I was also less critical than you when results were great, but I have never been entirely satisfied with or convinced by Xavi since his appointment it is true, I have always seen some worrying signs all the time, just as you.
As a player he relied on automatations and safety together with unseen vision and perfect technique. He was really great at deciding where to play and when, but he has not been able to teach it at all to his very talented midfielders yet. He was also a leader on the pitch, and a very stubborn and self-assured character. It seems these two things should go hand in hand to form the perfect manager for FC Barcelona right now, but instead he is taking the bad parts of these characteristics a lot of the time it seems. I still have faith in him, I think most of the time he speaks sensibly, but these last games has just been terrible, and with some decisions that really stand out from him on top. I think he has gotten it very right in some games too, with players connecting greatly and the team in complete control, but it has been too rare, and when Xavi doesn't get it right, it does look like he is holding his players back with his instructions.
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Sid Lowe pointed out that Alves has been missing in the lost games lately, and argued that his mentality could be much needed currently. I think it is correct, both his calmness and forcefulness with the ball, and his energy and drive without the ball is lacking when he does not play. He is of course superior to the alternatives technically too.