From August 3rd onwards several catering changes have been mentioned before; but there are few additional changes;

EUR flights over 2h 30 or so will have standard a 2nd beverage service in both C and economy class.( effective already since mid july or so )
In economy that will be mostly a coffee/tea service with a muffin though wine beer etc remain available ( also applicable to KLC flights on longer flights eg OPO)
An additional hot item ( ciabatta with brie etc) will be offered with the EBC box on the same longer flights

Longhaul flights;

IN WBC Soup ( hot) will return as a starter option with a new supplier ( De Verspillingsfabriek) This is applicable for flights over 7 hrs. ( eg JFK) On flights under 7 hrs a selection of 4 small bites designed by Sidney Schutte will be offered.( eg DXB)
On So called Short flights tin economy the 2nd service currently a beverage with a cold snack will be replaced by a beverage service and a hot snack.
short flights for klm are considered flights up to 7 hrs block time ; Gulf destinations , West Africa and Cairo
As mentioned earlier first service will offer a choices of 2 entrees. Bonne appetit