Yoshi has said in interviews that another two devs would mean improved raids. Here that's being taken as "Square need more money for more devs", but in reality, Yoshi has also indicated the the issue isn't money - it's finding two devs with the right skillset (including fluent Japanese).
Honestly this game has a truly fantastic content cycle when compared to any other mmo out on the market today. Can things be improved? Sure why not? There's always room for improvement. Is there a massive issue with content or a lack of development? Absolutely not in my opinion. Anything more than they're already doing is a bonus.
