As a non-SMN player I also want to say something about this topic.

As many poeple said you should not compare SMN with BLM because SMN has much more utility. So better compare it with RDM, as they have similar utility like both have rez and both have something to buff other players. DPS wise maybe SMN is a bit behind the other two casters but it depends very much on the fight. Assume you have a fight where you have to move very much like Titan, then BLM will ever be the last because RDM have dualcast (even if they have to use it right) and SMN have dots(best in that moment) and also some instant casts. And in fight with lots of mobs (e.g. A2) i think RDM will be the last and SMN and BLM will be at the same spot.
Maybe I'm completely wrong with all I said but this is what i can see as outsider.

Another topic is the design. I absolutely agree with everyone who is saying that some jobs need a change in design.