At this point, no. Arena is way more interesting and large-scale modes haven't been good since the first iteration of Frontline.

When Secure was first released, it was valuable to split the alliance across the map to capture objectives. Over time, Frontline has devolved into blob fests that contributed to the wild imbalances you have with damage resistance, etc.. If they ever return to map designs that push teams to spread across the map, I'd say yeah put resources into it. Until then, FL and RW are merely mindless playgrounds.