I feel like the big problem with SMN comes from SE not knowing what to do with it in relation to SCH.

As it stands now, SCH can do nearly the same DPS as SMN (you lose Fester and pet damage, but get Selene's haste, Aero and Cleric Stance). It really feels like SCH was designed first, and then they just switched the Faerie for the Egi's and called it a day without doing much tweaking. The real fixes I see are a base 10% damage buff for the Egi's, Fester not requiring Aetherflow, and giving SMN a trait that causes Bane to actually apply Bio, Bio II and Miasma instead of just spreading it. It would give SMN single-target damage that's more on-par with the other classes that don't have to worry about pet management/dot upkeep, and will let them get dot stacks rolling on trash/fates/adds much quicker.