Its ffxiv combat really so slow and boring?

[Yzuna]

I don't find it slow. It has, at 70, a lot of oGCDs skills.
But I do find it boring.

As a DPS, you don't have to react, adapt, ajust. Just do your rotation, endlessly, mindlessly.
As a healer, you can top off someone/the party with a couple of cast.
As a tank, enmity is decided with the first aggro combo, and it's then set in stone for the rest of the fight.

There was a small use for things like Silence/Stun/Bind/Sleep in the early ARR, but instead of building around it, they choose to forget it.
You don't have teamwork, synergy between jobs for dps, you just stay in your bubble and work on that rotation.

The only things that makes the fight interesting, are the mechanics of the fight, and even then, when you are familiar with it, it become trivial, because everything is scripted/telegraphed/timed.
Also, the animations are mostly gorgeous, which helps a lot.

I loved FFXI combat gameplay, it was slow and strategic. JA, spells and WS had to timed and planned.
I loved Blade&Soul combat gameplay, if was fast, dynamic, and you had to react, adapt.
I enjoyed Aion combat gameplay, it was fast and adapatative.

FFXIV combat gameplay ? I bear with it, for the aesthetics the heavy mechanics fight that are, at least, fun to do when you are learning them. And others things that I like in the game.
Which is also why I don't really like DPS, and vastly prefere Healers and Tanks.