Personally when it comes to Summoner I am in agreement with the spawn for 1 quick attack. The way the incorporated it for Yuna in Dissidia 012 for example. They only spawn briefly, swipe or attack then gone. Watching my brother level Summoner and realizing that you can't even do the quests for Titan or Garuda until you have actually defeated them story wise could remain incorporated into the future expansions where you still gain traits to buff your older primal skills but defeating new ones unlock the new primal attacks/skills once you hit the level.