1. Make GNW auto balance in term of power like arena.
2. Make all group only have 40 or even less members limit instead of 90+.

With just those 2 things I'm sure the game will be much more enjoyable for everyone. Because :
1. Once the power gap problem is gone, what left is pure strategy (and money to buy premium ninjas)
2. To prevent group hoarding from happen and also force people to creat more group.
The reason why a server that die too fast is because group hoarding, it's the cancer of this game.