I think this game is hard to the majority of people. After 5 tries at Titan EX through duty finder you will see that most people are really bad at learning mechanics. Some won't learn and makes the same mistake again and again.

Personally I think the game is a little too easy for me (i would put myself inbetween hardcore and casual) (can't say anything about coil cause I have never tried it, would probably like to if I could find some people who would want to learn the fights as well.)

I'm so happy for frontlines though, where I get to fight real people and don't have to learn a scripted fight. Fighting other people one on one is the hardest and most fun in this game to me.

I would love some hard 4 man content. Like EX dungeons