you cant much more linear than this game.
Played Final Fantasy XIII recently?
Dragon Knight Saga isn't that linear. It may not be entirely open but it's hardly you must stay on this path forever. Dragon Knight Saga is hardly the first game to restrict areas until you're ready to enter them. Borderlands is another example.
Oh well can't please them all.
Anyway back to the subject at hand.
They changed the interaction button to LB. It used to be on A which often ended up making you draw your weapon and attack uselessly for no reason when interacting with stuff. Glad they changed that.
Overall the graphics looks alot better.
It feels like enemies drop loot less often than before.
Overall enemies seem a bit easier to deal with on normal difficulty. On Ego Draconis I would struggle with some of the bosses in Broken Valley at level 2 but now they're a cakewalk. I think this is largely due to missile attacks not homing in anymore on the player.
The user interface is in general better.
Haven't gotten into dragon combat etc yet so can't see how that has been changed yet.
Overall the game is much better than Ego Draconis. Not perfect but it's definitely a large improvement. I'm really enjoying it.