The Egis could stand to be a little larger and more resemble their primal cousins, I think. Titan and Ifrit shouldn't float--I think it's quite silly that they do.

One thing I wish they would do, since we're not likely to see Egis change, is determine the effects for SMN's LB based on their currently summoned Egi. That way they could at least have the classic summon overdrives/astral flows. Terraflare is cool and all, but it sorta doesn't feel very SMN-esque to me.