It may be easier, but the start of the game seems designed for a warrior with high lockpicking. Without lockpicking, prices are too high for weapons, armour and potions, etc., so looting chests is your only option. Then you cannot dodge AND use the number keys for spells and practically all enemies have ranged weapons.
Then, because of the linearity, you don't have enough quests to level up and raise skills. This means it all seems false.
So as a warrior, yes, it probably is easier, but for a priest or ranger the Casual setting can make some battles difficult!
So if you cannot buy weapons and armour because they are too expensive and with few initial quests, you are always "low level" because you do not have a chance to level up. Anything other than Warrior and not maxing lockpicking is a big no-no as far as I can see.
So much for "being able to change your character and not be fixed into one type". I would say Larian have locked players into playing Warrior or dying every few minutes!
I actually disagree with this. I do not know how this applies to the modern Nightmare mode as I've only played Hard mode on the first version, but I believe the entire game, from Broken Valley to the end, is easy if you are built as a dark mage (good summoning skills and good mage skills).
Being a warrior for me is the most challenging, but the most FUN!
