I think you guys are failing to read what SE has clearly stated were the intentions of SMN. Its not meant to be a Primal only class, never was. We are Arcanist who can call on the essence of the primal. We do this without use of crystals might I add. By making SMN based more on summoning a more realistic and bigger primal, or more focused on our EGI, you're kinda spitting on the lore of Eorzea. Our Summon is support, not primary focus. Perhaps if we had the ability to summon a weaker version of the primal at a high crystal cost, and for a brief period of time, then that would make more sense...but from where it stands, I feel that the character works perfectly with the intentions of the game design.
Less not forget that Scholars still have the ability to use Arcanist skills too :P