SMN definitely is not broken and players who use it effectively can deal major dps. Personally it's one of the high hitters, although Physick and Sustain need looking at again but to each their own.
SCH on the other hand for sure has some issues. The mp cost of using aoe heals or galvanize is the loser against WHM and AST variants no matter how good a player's mp management is. Put Succor on equal playing field as Aspec Helios and that'd be a good start. Wouldn't mind having an aoe back like Miasma II to give the SCH a bit more utility than the current dots and Broil spam.