The proof is that he succeeded in turning Atalanta into a very strong team, even winning the Europa League. So, with that in mind, I'm confident that Gasperini will bring significant changes to Roma. Moreover, Roma also has a number of quite talented players, so with that in mind, I'm sure the results will be much better.
Furthermore, next week, Roma will face Torino. I'll bet on Roma again in this match, as I'm confident they'll win. Torino's current form is truly poor, as evidenced by their winless streak in their last two matches.
Do not be too sure to bet on Roma even if I agree that Torino is a weak team but then they can get brilliant and you will be surprised at what football can be. They can have this game as a chance to end their endless winless streak, Roma in their self is not in a very complete form and strength, they have an issue with consistency so they cannot be completely trusted that much.