People care way more about having fun over getting certs in most cases. Of course they usually go hand in hand which is why back capping a base or defending one against an elusive enemy is no fun and no certs. If back capping was intended as a lever then its gone too far. A quick couple of back cappers can totally change the map in less than 10 mins. Frontlines are way too fluid and people are spread out all over the map attacking one moment, defending the next unable to follow a clear strategy because no base can be locked down.