It looks like the Crafting system and Craft skills is out of the game as well quite a number of other skills, also they now have 25 spell levels and the Vancian system that we have enjoyed since the game's beginning is being partially removed.
I can understand wanting to merge Move Silently and Hide into one skill called Stealth but placing Listen, Spot, Search, and such in one skill is completely and totally messed up. Just because my character has good hearing does not mean he can see well, sheesh. Also they are removing skill ranks entirely. How the hell are we suppose to know how good a person is in a skill? Sure one person may have Knowledge (Arcana) at 5 ranks while another has it at 3 ranks, which would mean the person with 5 ranks knows more, but with the Intelligence modifier would govern how well the characters apply that knowledge. Now that sort of distiction has been completely removed.
More I hear about 4e the more I hate it.