Was by there earlier this evening - about 6 pm. Was an unusual non-windy day so no kite surfers. Also no one at any of the picnic tables. A few people on the long benches and a few more on the red lounge chairs. And a vehicle parked on the space with the yellow diagonal lines i.e. not a parking space. The occupants of that vehicle were eating, preferring their vehicle (the horror) to the picnic tables.
To follow up on the comment above "I think the animosity to this project is overblown." Absolutely not - those picnic tables and lounge chairs and benches will not be used most months of the year. There is a reason that area is popular with the kite surfers. Besides the wind, they will be covered in sea gull **** very quickly. And as other posters have pointed out, the city could have added picnic tables and benches to the grassy area in the middle. But no, the whole point was to take away the car access.