Most MMORPG's have open world pvp throughout the entire world. The only World PVP in TESO consists of being automatically balanced in Cyrodiil fighting throughout that entire region. I enjoy playing pvp in a variety of environments and Cyodiil is nothing but grasslands/forests with a small snowey region around Bruma.
The official news is you won't even be able to see the enemy faction when you enter enemy provinces, this is stupid and makes no sense at all. I don't know exactly how the shard system works but I would expect to see the enemy. To stop people from getting ganked and ruining their pve experience, Open World pvp should only be available to players who are at the maximum level. A flagging system for PVP being on and off should also be available for low level player but it should not be available for max level players.