I Like see a system where your summon can evolve in way square enix has done a lot the summons for ff series very different through years. people are complain about pet get lessor powerful my ideal is simple for ffxiv next expansion feature an system where the Egi grown in power but your control grown over them.

http://finalfantasy.wikia.com/wiki/I...al_Fantasy_III
http://finalfantasy.wikia.com/wiki/T...al_Fantasy_III
http://finalfantasy.wikia.com/wiki/Garuda_(summon)

in next expanson they add job traits and they effect for summoner her Egi