The evolution of platinum games:
At release the first thing people tried to do was farm White the same way they did Geth Gold. It was kind of crappy.
Then the next big thing was farming Glacier from the small room in the center. This was so popular, they changed the map so you couldn't go into that room.
After that, sadly everyone started playing Rio so they could stay in the box. The problem is that this map sucks for objectives and it wasn't nearly as effective for farming with random players as old Glacier was.
Giant got more popular around the time the last challenge came out, and I even hosted games on that map to try and drag people through.
In any case, every single map is campable for the duration of the game. Ease of objectives should be the real reason for selecting one map over another, and some of that will be up to RNG. Goddess is a good camping map, and really only has one or two tricky objectives for a team. Hydra is the same way. Condor is also not bad for a team, especially if everyone decides to just take PPRs so ammo box glitch can't have any effect. Jade has basically one bad device, although it is a doozy.