Hosting it on the Seine was really thinking out the box and a brave decision, but three things. It lacks the atmosphere of a stadium, the weather is dreadful which is causing problems and they've had no rehearsal, which really showed in the opening ten mins. They seemed to sort the cameras out, but then all those fountains getting in the way of the filming of the boats.
The Eiffel Tower bit is excellent though and excellent backing track in Supernature.