There are other people, who don't main SMN, think it's a weak class for competitive progression. Like you're better off doing the double MNK cheese, and that's what the top 2 (maybe more did that too) world t13 clears did.
I have a friend who loves to play SMN, but for FCOB, his static forced him to change to BLM and he's in high-level FC. This is just an example of how SMN's are viewed currently in hardcore FC's and statics. No one wants them unless you're a really good SMN who can hold out your own, and even if you are, an equally good BLM can do everything better than a SMN. You have to play near perfectly to achieve really high numbers and SMN have quite some limitations right now. Their Enkindle is too long of a cd compare to, say, Convert, and the potency is lackluster for something that has a 5 minute cd. Then, you have a useless skill on Ifrit-egi, like Radiant Shield. There's no point in having that skill ever if it's not taking damage.. Speaking of another useless skill, Tri-disaster is also insignificant in anything and everything, except PvP, and the MP cost is dumb. Aetherflow stacks is also limiting down SMN's, too, cause for the first 3-4 minutes of a fight, you use all 3 stacks for Fester and then if the fight extends for longer, you gotta use energy drain once in a while cause that's the point where SMN's are on the verge of getting OOM. After that, the only thing keeping you up is putting DoT's up and if you miss putting up a couple of DoT's, then your damage will lower a bit, because for example, you had to dodge mechanics or move to deal with mechanics and couldn't cast your DoT's up.
Please, ignore past this point if you don't wanna hear me QQ:
Personally, I know I'm doing alright as SMN; I feel around kinda above average, but isn't at the exceptional level and will never be. I have cleared all of FCOB and so far my experience in it was a damn struggle cause I thought of myself as a dps hindrance to my static. I became frustrated at how much I was doing and thought it was my fault for not pushing through another Flatten or Megaflare in t13. Because of it, I didn't enjoy playing SMN anymore and so I'm just working on gearing up BLM, trying to get that zodiac weapon. I wanted to play NIN, but I haven't used any poetics on it and had less practice on it than BLM. Eventually in the future I'll play something else...