I would say yes.

As far as pet classes go, it's not a complete failure, but compared to Summoners in single player FFs as well as other pet classes it's in the back of the class.

At the very least, I think they should strongly boost the power of the Enkindle abilities to give it more of the "Summon Limit Break" feel. Would 500-600 Potency be too overpowered? I honestly don't feel like it would be, it has a 5 minute cooldown as it is so it's not like it can be abused that much.

From a gameplay standpoint as a DPS it's still good, there's nothing offensive about it, it just scratches the surface of what a summoning class could be. Did I mention it wasn't as good as the single player FF incarnations (or WoW's Warlock)?