Let me start off by saying that I am not trying to bash on the game or anything. I like the game, I think it is fun.
That being said, I will get back to my point. I think the game is a little too difficult for newbies to understand. There are so many layers in the game, it becomes hard to follow. Eg. there are several types of dungeons- normal, abyss, soul. Then there are ranks, skills, levels etc.
Then there are combination of heroes and skills and skills sharing. You get my point?
While these things might not be complicated for everyone, they are to me. I find it hard to follow. I find it frustrating that I can't figure out whether my team is efficient or not; whethere I should keep a particular hero or not.
I think there should be some sort of guide to help idiots like me understand all this more easily