Nothing is like PlanetSide. From what I've read about "The Agency" and "Global Agenda" they won't be like it either.
The primary thing in PlanetSide is that a large group of people could set their own nightly event agenda. They weren't forced into a game model. If you wanted to have your crew to be heavy armor for the entire night there was no limit to the amount of time, material or number of tanks you could pull. Every night was fresh provided there is enough population. PlanetSide gets rolling with about 1000 people online.
If you didn't want to group and wanted to be Rambo you could give that a go as well. Some people were very good at that.