First of all Zenako, thanks for the report. Second of all, I will have you guys notice! Zenako, who is clearly not a noob or new player just admittedly learned Stealer of Souls better by soloing through Casual. I too have a habit of going in circles the first time through a quest, you should have seen me learning Inferno of the Damned. There's never anyone around to tell me where to go or what to do. Do you think I learn maps better by having to pay attention rather than just following the group? You bet.
Sorry to throw you up as an example Z, but I had to point that out. Casual is not the death knell that some people are claiming it to be. It is a very useful tool for all ability levels.