I've played through the game on normal and I really felt as though the difficulty was a bit much at times. Similar to the first game the difficulty often appears to gate you away from certain content, to the point that you're playing the game in a rather specific designed path.
Often times, the struggle with the games difficulty lead to abuse of the games systems in interesting ways, and I can appreciate that, but there were other times where it just felt restrictive.
Also because the game forces combat instances on you, it's important to save often. Sometimes you'll have a fight start which is just too strong for you, or one that your party isn't properly positioned for. At least for me, many fights required a reload before they were even approachable. Enter a fight at the wrong time and you can find that your more glass-cannon style characters are dead.
When I play games like that, I often find myself wishing that the game incorporated some form of 'rewind' mechanic into its systems. Every time I pull up the menu to reload the game it pulls me out of the experience.