Gameplay is still really reliant on the "meta" game (local rivalries, meeting up with teammates, etc) for long term entertainment but as far as in-game mechanics, after a certain point, you need to earn badges for different things like holding areas or creating fields over densely populated areas in order to level up. Between that and missions (stuff like "hack these 20 portals in this one historic district") there's still a bit to accomplish.

That said, it can still get old fast. King-of-the-hill + geocaching essentially. Claim areas, lose areas, nothing lasts for long, etc. Still, it can be fun to see the opposing faction trying to make a big field to gain points before the end of a cycle and coordinating with other people in your town to knock it down before they score those points. Same goes for the opposite way.