I operated into Nice frequently in the nineties, and don't remember any approaches this complicated.
Been there many times as well, but usually on 05 (now 04) due to northerly winds.
I only landed on 23 just a few times; it remember it as a tricky approach, you come in on a high approach angle (terrain or noise?), always with tailwind on base and a final turn of about 90 degrees, making it harder to assess your visual gp until almost established on final. Also seem to remember a kind of visual distraction (can't call it illusion): two parallel close runways, approach over water, coast converging at an angle, not the usual visual image of an airport..
All in all a challenging visual requiring you to divide your attention. When things get hot, easy to focus on one thing and forget the others..
Not to mention team work; this one is a team effort, needs good coaching..