AVB could still become a good coach, his treble campaign with Porto was quite impressive. However, he made the worst choice possible by going to Chelsea and expectations were also high at Tottenham. He still has a lot to learn.
His treble is impressive but lets keep in mind that it was Portugal. The Portuguese league is nothing more than the Scottish league, his successor didn't do a much lesser job than him in the league whereas AVB had Hulk, James and Falcao, with that front trio you'll always be favorites for the EL.
I'm sad to see AVB go in some ways, it was the right thing to do considering the team was horrible but people discard the fact that Spurs had achieved their record points with AVB in charge. You sell Bale, their best player and sign 10 new unknown players and you are in a proces of rebuilding, the very least you could have is patience. I don't think any elite side, like Tottenham, will give AVB a chance. He'll need to start from the bottom now but I've got faith in him. Considering AVB is all about positive football, I hope he'll give Spain a chance.
I think Baldini should be given the sack too. Bar Lamela and Paulinho, I'd say all his signings were failures to start with.