You're very right with your observation and opinion about Juventus management and need to re-evaluate the club's kind of football for next season because it's obvious that they'll finish this season without a trophy.
Juventus might not be able to compete for the Italian Seria A title but they are in the semi-finals of Copa Italia. They played the first leg and won Lazio by two goals to nothing. The second leg will come up on April 23rd. So the club has hope of winning at least a trophy this season and we shouldn't also push aside that they might also qualify for the UCL a feat that Napoli the defending champions couldn't attain. I couldn't even believe what I saw in that match. The hosts continued to come under pressure from Fiorentina. And it was difficult to take control of the ball from Fiorentina. I don't know if Allegri's strategy was deliberately made like this or whether this is proof that Juventus is in a performance crisis. but the final result is what is most important here. but to be honest, I was surprised to see how many Juventus players made inaccurate passes. This is not like the Juventus we saw at the start of the season. 
Fiorentina is not a mediocre club that can be whitewashed by Juventus. Actually, Juventus was not at its best but the most important thing is that they got the three points. The Old Lady showed some good attacking football that produced three goals two but two were cancelled after VAR checks. I think the club needs to change its strategy to enable them to control games instead of allowing opponents to be in control thereby putting the defense under pressure.