Overall Allegri has been able to make Juventsu better compared to last season, but to compete in the Champions League next season I think that is still not enough, Juventsu still has a lot to improve to improve their performance, especially they have to bring in several quality players. to fill their squad, currently I don't think there are any Juventus players who stand out in helping make a big contribution to the team.
When compared to the previous season, I think Juventus' position is much better this season. I think it is impossible to fire Allegri just because he failed to get the title or second place. After failing to qualify for the Champions League last season, I think this is a good achievement for Juventus this season. And as you said I think Juventus will have to bring in some other players to face the competition next season. Playing in the Champions League and Serie A will be tiring and if they play inconsistently like this season then it will be very difficult for them.
Juventus often lose by mediocre teams and obviously, these results are bad results. Although in the Serie A standings Juventus are still in the Champion League zone but still, Juventus are still very weak and it is a bad result as a team that has great dominance in the acquisition of the Serie A Scudetto. With the results obtained during the Allegri era, I think Juventus clearly need a better coach, of course, to make Juventus really manage to develop and not decline as happened in the Allegri era. Perhaps, most consider Allegri a successful coach in the past, so they continue to support Allegri until now. But for me personally, Juventus really need a better head coach than Allegri, because with Allegri that Juventus still looks weak.