Nonsense.
Learning enemies by "reading" their animations and learning their "tells" is a very long-standing means of learning and defeating enemies in games - MMOs and otherwise. You only have to read the chat log, or look for circles on the ground, if you never bothered to learn the encounters.
I've been playing TERA for the past month or so. In TERA, you have mobs known as "BAMs", they're basically miniature raid bosses which can take several minutes to kill (up to 10 if you're soloing them).
They each have some seriously powerful moves that can mess you up in a number of ways (slow, DoT, massive spike-damage, knock-down, etc) and make a good fight go bad very quickly. There are no rings, cones, lines, or anything indicating what its move is going to be. The only warning it gives is that, for certain attacks, its eyes will flash red before attacking.
At that point, you have to pay attention to its animation/behavior to determine what its attack is going to be, and then react appropriately to avoid or prepare for the attack.
However the red flash doesn't happen before all moves. Some are telegraphed only by an animation it does prior to doing the attack.
There's nothing else. No other indications of what its damage radius is or of how far away you have to get. Yet, people learn the individual BAMs, learn their behaviors, their attacks, their attack ranges, and their "tells", and become capable of taking them down - even solo.
Check out this video. This person is soloing a world boss, likely intended for 5 people. You can see how they react based on the enemy's animations, and know to get out of the way, and how far. They know how to tell when it's setting up for its AOE electric field. They know how to tell when it's going to leap. They know how to tell when it's going to slam its tail down, etc. One bad mistake, and that fight could have gone down the tubes for them.
While I'm not nearly on level of this player, I've managed to take down a number of BAMs solo myself. It can be extremely difficult when you're not as familiar with them. But it's also actually a hell of a lot of fun and very rewarding. Especially when you get to the point of knowing how to read a BAM - which used to smack you around like a rag doll - well enough to get through an entire fight almost unscathed.
And please, nobody say "well, TERA's an action game, FFXIV Isn't... so it's not the same" because that makes absolutely no difference here. Whether the combat is point and click, Tab Targeting or Action-Based, it would apply exactly the same way. Also nobody say, "well stop trying to turn this game into TERA", because that's not what I'm saying either. The concept of depending on 'tells' and animations to know what an enemy is going to do and follow appropriately is not limited to TERA. It applies to all styles of combat. In fact, it's been in previous FF games as well.
The problem is these days - the impatient, "gimme now" generation we're in - people have become spoiled by and dependent on Wiki Guides and Helper Add-ons to complete anything. The Helper Addons in particular have become an absolute crutch. It's most apparent when you see people (as several have in this thread, and on other forums) arguing that it would somehow be not possible, or overly difficult, to defeat enemies by learning their patterns and figuring out how to fight them effectively. It seems, in some cases, like these people don't realize people have done just that for years now, and continue to in some games to this day (see my TERA example above).
It's not some crazy, untenable concept. It's a tried-and-true, road tested and proven mechanic in games, particularly against boss type creatures.
So, it's clearly not an issue of "it can't be done". It's an issue of "they don't want to do it". Two very, very different things.
It is what it is. Yohi-P has been clear in his intentions to make this game extremely casual friendly, with "strong guidance" (his words) in the gameplay and such. So, hey, for the people who "need" (read: want) things spelled out for them... rejoice. You're getting your way. Those who prefer to be a bit more involved in the equation and figure things out for themselves will learn to deal with it, or move on I suppose.
Just another example of how players are pushing to have their games more and more simplified, and more and more dumbed down. All the while, complaints of "why are games getting so boring?" are increasing. Coincidence? I don't think so. I'd say it's Cause and Effect in action.