I will admit that some MSQ's and job quests aren't really clear on the objective. I vaguely remember one where the objective was something like "feed Alisae aether," and I had no idea what that meant. I tried selecting and interacting with her, attacking her, continuing to kill everything around her. I was a couple failures in before I figured out what the hell the game wanted me to do.

I've found that to be the majority of what's "challenging" about this game; just obtuse, poorly explained mechanics that leave you standing around scratching your head.