The Ronda magazine states the eight new Airbus A330-300s will be deployed with the new business class (entering service between mid-February 2013 March 2014), as well as new tourist seats; it says A340s to Angola, North and Latin America will begin offering the new cabin amenities as of May 2013.

link to specific pages on Ronda

Until all aircraft are rationalised to the new Business Plus class of service, we'll be playing roulette - particularly given the current state of affairs of more or fewer Business Plus cabin space. We can count on March 2014 for the A30-300s, assuming deliveries are on time, and maybe not so much for the A340s, depending on when these rotate in for heavy C checks (which is most likely when they will accomplish the cabin swaps); many heavy C checks are scheduled every 24 - 30 months, depending on Hobbs (flying) hours and cycles.