As always, there is a huge bias among the people likely to post on forums compared to the total population of people who play the game. People here play more often, do new content sooner, and are way more likely to do more difficult content in the game than the average player. It's natural for those types of players, for whom a single game is a big part of their lives, to feel like the game is second nature and thus quite simple to execute. Then any decrease in complexity for those people is going from "easy" to "even easier."

But this is simply not the case for a huge percentage of players. They don't level up 17 jobs to the max, they don't cap tomestones every week, and they definitely don't do every raid and extreme and ultimate every time they're added. They play the game for a little bit when new story is added, and it takes up only as much time as the other 30 games they played that year (or they actually have "a life" and don't do that either, but you get the idea). There are way more people who are closer to this style than "half" of the people who play the game, and there are of course even more of them who don't play the game at all because MMOs tend to be inscrutable to newcomers with only really WoW and FFXIV ever breaking out into the mainstream of gaming. I've had a handful of friends who have tried FFXIV out at various points and they are completely overwhelmed by how many actions they have to learn when to use, as well as the thousands of UI settings and various menus that mean nothing until you've played the game for 50 hours.

I don't mean to say that either of these is more valid than the other, just to point out that a company like Square Enix providing a subscription service game is going to go with doing the thing that they think is good for a majority of people and not a minority. It might seem like the forums or "everyone I know" agrees that the game is too simple or too easy, but that sampling is heavily skewed and not likely to be representative of the real majority.