I don't play summoner, but I honestly think they really could do with some kind of rework both from a visual standpoint as well as gameplay-wise. Maybe as the summoner gets more powerful (higher level) their summons evolve as well. So when the new expansion comes out with a higher level cap summoners above 50 have their summons look a little more like primals and are a little bigger like OP suggested. Also, no this is not a "I want XI summoner" post, this is about making it up to par with pretty much any other game out there that has a class similar in style.