I think there are a lot of cons. Despite the fact, that it also has some proses. The main pros that are time for the world ending will be reduced. And I also would like to notice that developers had taken into the consideration a lot of mistakes that were in the first announcement.
But, this new ENDGAME will give chances for cheating.
1. OK. First of all, it may overshadow the war. Because the whole game will be developed into the "who base new cities, making the BPs on twinks and making new cities, new cities, and more new cities! ". No war. Just base new cities in the valid domination area and do making BPs anyway.
2. About the "valid domination area". What is this? How does it work? Let's say we have the world where only is 4 central oceans are full-populated.
And we also have in this world populated 0, 9, 90, 99 oceans. What about them? Will this oceans stretch this "valid domination area"? Or this area will be available only for the 4 central oceans? Because if so, then it doesn't make a sense for others oceans. They will be unnecessary.