Dammit. I was planning on collecting everything but I have no idea if I'll be able to do anything in Expert Mode.
http://www.reddit.com/r/Terraria/comments/3bep6m/you_cant_use_expert_mode_items_in_normal_mode/cslmxwt Cenx commented here.
I don't see why you're mad that the devs took time to change something because the community asked them to.