Is there something more in FF14?

Like the title says, I have played this game because my friend hyped me up on playing it. I came from games like WoW so I thought I would try this one and apparently, my knowledge in that game transferred in FF14 so it wasn't that difficult to learn it.

I have gotten to level 50+ and I am still waiting for that charm that will make me hooked into this game because I have read a lot from other's opinions that it gets good as you progress but the thing is it just made me feel like the experience is very railroady. The gear progression has no aspect of luck into it like every early equipment will be provided by the game or npc sells it so my progression has no touch of randomness. No spike in power if I get this certain item by luck. My experience will be the same as that guy who played this game 5 years ago. I have only tried playing the 2 tank class, Paladin and Warrior because I like playing tanks in holy trinity but they feel almost the same. I will use WoW as a comparison. In that game, Paladin, Warrior, Blood DK or Bear Druid feels different. If I am a healer, Discipline priest feels different from a Holy Paladin or Restoration Druid. One spams heal, other gives HoTs and the other shields rather than traditional healing.

I haven't bought the full game experience because they told me that there's hundreds of hours of free content that you can squeeze before getting into full sub but I don't wanna buy it if my experience right now will not change further into the game so I want to know if there's something I can look forward to. Another thing is the game feels very much a single player. There's really nothing much for my friend and I to do outside the dungeons together because we have our own MSQs to finish.