Defensively not offensively. Pirlo's vision and long pass accuracy is still unmatched. If anyone can compete with him in terms of vision and long passing accuracy its alonso and modric and thats only because Pirlo declined.
Overall marchisio now is an upgrade on Pirlo yes because the weight of creating chances was carried by Tevez and Pogba too last season. But now that Tevez is gone and we are stacked on defensive CMs, a creative CM/CAM is needed again. You cant expect Dybala to equal Tevez on the best form of his life.
Let me put it this way. The offensively creative players from last season were (1)Tevez, (2) Pirlo, (3) Marchiso and (4) Pogba. Even then we were much less threatening in attack than the elite clubs and we wanted a world class CAM to bring us closer to the attack that the other teams have.
This season it is (1) marchisio, (2) Pogba and (3) Dybala. So not only is it 4 against 3 but also Tevez was at the best form of his life while dybala is still a youngster. So its 4 against 2.75 assuming Dybala is 75% as good as the best Tevez. We need a great CAM to numerically maintain the same level of last season in attack. Some one who can make up for (Pirlo's creativity + the difference between Tevez and dybala).
The priority should thus be a CAM to maintain our offensive level. Next year we would naturally improve without signings because of the increased chemistry of the CAM and dybala, and the growth of the CAM, Dybala, Morata and Pogba. We would only need to fix the defense and GK situation.
I dont expect us to be as good as last season. No one should. Last season we were over-performing and had a very stable squad. This year its transition so the objective should be QF and scudetto. If the decrease in quality is from finalists to QFs then Management have succeeded.