There are still many obstacles for Como to improve on last season's position. But if the Como players' determination remains extraordinary, I think Como can reach the position you're talking about. However, a team like Como will have to be able to compete quite fiercely if they want to achieve more surprising achievements, as some teams in Italy have already made quite a few changes before the season officially begins.
I think Como are getting a lot of attention right now, they had a really good season (especially the end of it), but they only finished 10th and that's not enough to call this season a success. Fabregas is ambitious and they signed Morata, that's a really good transfer but I have my doubts that it's enough for Como to get into the European Cup zone this season. But maybe Fabregas believes that because he turned down some good offers from other clubs.
Como already pulled off a surprise last season, so it's possible they could pull off another one next season.
Fàbregas has made some good progress in slowly building the Como team, and I think this progress will only improve the team over time. I'm quite optimistic about Como next season, whether they reach the European spots or not, but I'm confident they'll be in the running for it.