For summoning I think it would be cool to make them more dynamic. Two concepts come to mind. You can have elemetnals/pets that act as a quick summon support adding a boost to the party. The other concept is astral projection in which you project your body into the avatar you have made a pact with allowing you to control it within a certain radius. While given a unique set of commands based on the avatar you are using your body is left defenseless in which mobs are still able to do damage to you. With this concept a summoner would have to rely on allies to keep them safe and it would be interesting to see it done well in an MMO. I think it would be fun to have to protect the defenseless body of a summoner as he/she uses their abilities to take down foes with their ferocious beast. Though with that in mind I would add a astral projection fatigue for like maybe 1min after they are forced back into their body if they are slain/send their astral form back to their own body.
I am interested to see where you will be taking smn/bst though it'll be interested to see how they are implemented to be unique. I do understand that it can be hard to balance them properly but given the format of XIV it shouldn't be to difficult to make them work in the game.
