We were there last summer and will be going back in a few months. With the ever changing/improvements happening at the resort, it's hard to say what's new since you were there last. The biggest change is probably the Beach Club, which is available to Grand Luxxe and Grand Bliss guests.
The Beach Club actually underwent a remodel already. I've found some pictures via Twitter and TripAdvisor. Looks amazing. Another section of it is supposed to be opening next week.
They've also added extensive wooden walkways throughout the property. The area around Balche` was redone when they added the walkway, the entrance is no longer open/shared with the pool deck.
There is also the Cirque du Soleil across the street. Even if you don't go to the show, it's worth a trip over there. There is a restaurant ( Nektar ), bar and music in a beautiful atmosphere.
The Spanish restaurant Chiringuito is next to the Beach Club. I think that underwent some remodeling as well. Great view of the water while dining. The Paella is fantastic.
Hope this helps.