great idea I take it you seen my thread about cross realm arena yesterday,
but for those guilds that already hold cities should keep them when the new guild war starts(otherwise its unfair), muti attacking guilds on the cities held by stronger guilds so there would be alliances between guilds to take over cites, more guild cities to go after would be fun & holding against new foes for an extra challange & better rewards, we do need something to keep players interested in the game.

What would be a good idea is 2 types of arena, 1 for cross realm stronger players & the other standard realm for the lower players so they would have at least a chance to climb up in rankings.

Also some new side quest sort of like manual grinding for XP,materials, plans, runes anything to keep players entertained longer, we come in to play & 2 hrs later we off playing some other game til we have enough stamina or next boss to challange, but thats another thread.