Good thread! Snowballing in PvP almost seems like monopolies eliminating competition: you need a trustbuster.
One theory I have is that it's too easy to project power in MMOs; logistics aren't nearly as important as they should be. Defending should be easy; projecting power should be hard.
I think that's partly because in MMOs, no one can be online all the time, and so an organized attack squad is much likelier to have a local advantage, wherever they decide to travel.
A couple possibilities to make projecting power harder:
- Realistic food requirements. The farther away from home you travel, the more food you've got to carry or scrounge. Make this hard enough, and big armies will need to slow down to bring carts of supplies with them, reducing the likelihood of "stacks of doom" blasting remote, weaker cities.
- Always online defenders. Allow "ghost" versions of citizens to always be defending the city, regardless of whether or not the players are online.
Since Fractured has horizontal progression instead of traditional leveling, however, I suspect that snowballing may not be such an issue. We'll see.