Hi as an expat living in Sousse, I would also agree that there has been no change and from what I see or hear more people visit and then decide to live in Sousse, it is a very popular tourist attraction.
Not only is there the history and cultural side to Sousse but you also have the tourist side, only about 10 mins by taxi you will fin the tourist resort of Kantaoui which is a very popular destination with plenty to see and do, as well as beaches, water sports, hundreds of hotels, the marina and then the adjoining water fountain encircled with shops and restaurants and the Hannibal Park for amusements and rides as the season hits its peak so does Sousse and Kantaoui
