Rohl was brought on as a second-half substitute at Goodison Park, having joined the club from SC Freiburg in a late transfer deal.
Moyes acknowledged that it's challenging to make a comprehensive assessment of a player after such a short period of time.
However, he expressed his enthusiasm for Rohl's initial impression, stating that he has shown promise despite the limited time on the pitch.
Moyes praised Rohl's performance, noting that it's never easy to make an impact when introduced into a game, especially against a strong opponent like Aston Villa, who have consistently been one of the top teams in the Premier League.