I'd love to have a Summoner class, they were my favorite job to use in FFT. The summons they add in FFXIV don't have to be the major one's that have been in FF games so far (Shiva, Ifrit, Bahamut, Ramuh, Leviathan, etc.), since they're extremely powerful and it would be weird to see dozens of people running around with each one. SE can make up some minor summons so they could still have the major summons seen as god-like.