ok so the first free look at D&D5 rules is available. Here is my only slightly distilled thoughts after having read through it in roughly the order stuff appears. (FYI in terms of D&D I played a little 3.5, but know 4e best, so will be comparing most things to 4E.)

here are the rules btw.
http://media.wizards.com/downloads/dnd/DnDBasicRules.pdf