While I anticipate it will be some time after 1.9's release before all of the plugins have been updated so the network is actually in a position to update, I welcome the new changes. I think, as with every update, there are thing people don't like, simply because they are different from the Minecraft we all grew to love. These same concerns were raised with 1.8 and 1.7 and I expect they'll be raised in future updates too but after everyone's gotten used to them people really enjoy the new changes. The possibilities for KitPvP and other PvP gamemodes with the new arrows and shields are far greater than Minecraft in its current state can accommodate for thus the minds behind bringing new gamemodes to any network will be able to showcase some really exciting stuff!