We all know that Yoshida wanted to make an MMO which was accessible for everyone. From Hardcore Raiders to casual players who can only play every once and a while. The game was to be story driven, with a rich story and job system that would give that Final Fantasy feel to it. This resulted in the Themepark MMO we have right now.
Sure, the game is far from perfect, with it's quirks and "system limitations", but also players who want more casual, midcore and hardcore content (aside from more glamour options, minions, mounts, collaborations, races, jobs, etc, etc). There's nothing wrong with players wanting more content, tailored to their taste. Personally, the more content to play, the better.
However, there are limits to what a company can produce for their product while retaining the highest quality possible. But, we cannot say where these limits lie and if they can be "easily solved" by simply adding more developers to their staff. That is something the team itself and the upper management has to decide. You can't always slap more developers on the case in order to make something bigger and better at the same time.
Yoshida gave a good explanation on it during the interview with MizzTeq:
Source: Question Six (MizzTeq NA Media Tour Interview)Originally Posted by MizzTeq
It doesn't mean that they won't increase their team over time. It just not like they can open a can of developers and tada! New challenging raid content! \(^_^ )/
Not all content is for everyone and we should respect their opinions on it, because that's how they see it.
I've been here since the Alpha version of 1.0 and I love to see people enjoy playing the (current) game as much as i do. If you feel like the game could use more content, just let them know through the forums. It might inspire them to create just that or maybe something similiar (which would match their vision of the game).
I would only ask not to berate others from making these types of suggestions (calling them elitst, toxic, trolls or tell them to find another game), but also refrain from berating the developers if something doesn't turn out the way you want to (calling the game "crap" because it "only has x bosses"). At the end of the day, we are all just people who want to enjoy ourselves and invest time into something love to do. This applies to everyone, even the developers who are working hours on end to make stuff which we can as players can enjoy.
There's still more content to come. For everyone. I for one am dying to get my hands on Eden Savage and the Yohra Raid (which will be introduced in 5.1).