The JP SMN discussion thread has a some awesome suggestions for SMN.

First, change pet crit proc to mana regen.
The main problem with SMN right now for the limit on dps is mana issue. I can't afford to use RuinII during movement because that will drain my mana so fast.

Another suggestion would be egis benefiting from foods.
There is no reason why we uses the same equipment as BLM, but are forced to top our acc to that of a melee, without food, so that our pets would have 100% accuracy.
Also we don't benefit 100% from the food as the other classes.
Say our pet does approximately 30% of our total DPS and us ourselves do the other 70%. A food buff that increases your DPS by 20% would only increase a SMN's dps by 70%*20%, 14%, where everyone else gets the full 20%. This isn't fair, and the gap between the SMN and rest of class increases as food buff becomes increasing better with new crafts.

Of course there's also the auto attack issue but I don't think a lot of ppl use it.