People said the same about Quagliarella, nobody knows how he will turn out some thrive in a big club, some crumble.
We sign many players with the hope that they will do much better than they did in their entire career, even though those players are 26,27,28. Coaches too, not just players.
It might work once in 50 cases. We can't allow paying for 49 players who'll give us mediocrity, just so one will surprise and do better than expected. 27 year olds won't suddenly become great when they put the Juve jersey on.
Also, a comparison between Quag and Matri isn't too fair. Quagliarella's main problem for years was his inconsistency. He caught the eye of many teams since he was 22-23. He was always scoring beautiful goals, always been great when in form, he had the talent and teams were actually paying 16m eur to buy him even before Juve bought him. In the past too he had great periods like he had with us in the 4 months he played for Juve. He was called by his NT coaches, played at 08 euro, 2010 WC etc.
Matri has almost nothing of the sort behind him. He's a typical
Almiron signing.
Like I said, my hope and expectation is that Matri will have solid 16 rounds till June and score some 7-8 goals. I don't expect long term success from him.