I really don't know what all of you expect from Tata.
You say he hasn't tried to make changes, but that is clearly incorrect. He has tried to make the team do different things. Long balls, more counters, faster attacks, tried to get the pressing back, tried to make the team defend more solidly. For the most part, he has succeeded in all of this.
You want someone to do what Guardiola did, but that is extremely unreasonable. Aside from the fact that Guardiola clearly is a different animal, what other manager out there has the standing, the respect and the overall surrounding situation to do what Guardiola did at Barca? Alex Ferguson at Man U, and maybe Mounrinho at Chelsea. That is it.
No other manager can come into a new club and get rid of their best players and make such radical changes with so little impunity.
The team, not the manager, just doesn't have the players to play at the level people demand from this team, just like Tito didn't have them, and he easily had more leeway than Tata has just by virtue of being cule and being Peps second. By the way, this demand for the team to play like the way they were playing during their golden era is also extremely unreasonable. Teams don't go though such periods every year, that's why they're called golden eras.
The team just doesn't have the same player and those who remained have clearly seen their better days.
There is no Abidal giving solidity and defensive muscle at left back.
There is no indomitable Puyol refusing to lose and unwilling to let others slip at center back.
There is no strong, skillful, goalscoring and direct forward the likes of Eto'o, Henry, Villa.
Dani Alves is clearly not the same player. He has declined.
Xavi is clearly not the same player. He has declined.
Pique is clearly not the same player. He has lost form.
Iniesta has been up and down.
Meanwhile, you've replaced the defensive cover in your fullback tandem with a dynamic offensive player in Alba, but who is clearly a defensive weakness.
You've replaced your strong, technical, direct goal scoring forwards with weak, creative, non scoring wingers. They're not even good at tacking on defenders aside from Neymar.
All this being so, yet people want to blame Tata for the team clearly not looking like it did in the past? It does not look like in the past because this an entirely different team. This is an entirely inferior team.
The team is still good, is still a top team in Europe, however it is no longer a dominant and trampling force. It needs turnover. It needs new players. It needs an infusion of talent, an infusion of youth and an infusion of hunger.