I played WoW for many years and I actually really like the combat in this game. The early levels of the game were kind of dull from a combat perspective because you have so few abilities to manage, but once you start getting past 30 and into the 40's the game really picks up (in all phases, for that matter). It might not be for everyone, IDK I can only speak for myself but in no way is the combat too slow for me to enjoy.

I plan to start leveling my pugilist/monk pretty soon and that seems to have a lot of things to keep up with from a dps perspective since I am a white mage right now. I have plenty of things to be doing in dungeons at my level, and I have to make the right decisions with what spells to cast and when or people die. It is different for a dps class or tank but it appears that many of the classes/jobs have to think about how and when they use their spells to the maximum effectiveness.

Thought I should also add that I have zero interest in PvP in this game (as is the case with every MMO I play) so I could see it being slow for PvP maybe but really that is no concern to me. I play MMORPG's for the PvE.