i think guild wars will be fun 
but i do agree that something new iin the way battle is done would be great, for example:
- something like new mana flow mechanics (exampleA )
- something happening to the gems (example: treasure hunt) or gem dropping mechanisms
- something happening to the troops during a fight (exampleA )
- different victory conditions (ExampleA )
a new mode like that could bring a lot of fresh air to the game
modes that give new matchmaking (guild wars) but dont really influence the course of battle are also good but the core of stagnancy is the actual battle
there already has been some feature resquests of minigames and game modes that do have mechanisms like the ones i listed, later maybe ill put some links in