Why Do Objectives Are Now Different?

For a reason that escapes me, they changed the location of some objectives in different maps in Breakthrough. One question: WHY? It was going well before. Now, it is impossible to win a game when you are defending… enemies are just stepping into the zone without any challenge. Isn’t that the fun of Breakthrough? Challenging objectives to capture or a vantage point to defend. Anyway, what do you guys think? And EA, explain this to me, please.