I've read the new D&D PHB cover to cover, more than once, and I am getting to grips with the new system.
And I have to admit I really like it, the new PHB is well put together and the rules flow through a very logical progression so it makes reading and understanding the new rules straightforward.
Here are a few points that I have made with regards to improvements in the new version of D&D
1. Stat increases for the race you pick are a lot better and give you better chances of gaining high scores in the stats that you need. (Not that I am a power player, but getting the right stats does help)
2. The new Advantage/Disadvantage system is very simple but an excellent way to DM situations that are of a benefit or against the PC's.
3. The spell lists are listed alphabetically and not by level or class any more, so finding the spell you need is super quick.
4. The disclaimer on the inside of page two is worth the price of the book on its own....hilarious!
5. Amazing artwork throughout the book.
6. You get to pick from a base of 8 races and 12 classes from the basic PHB, this gives you more than enough scope to play a character and class that is customisable to you.
7. Base modifiers for stats start at 12-13 now, so by getting these as a score you at least get a +1 to associated rolls.
8. WoTC have embraced all of the "old school" mythos once again, as soon as you read the first few pages of the PHB you are immediately put at ease from seeing words such as Forgotten Realms, Greyhawk, Darksun, Spelljammer, Ravenloft, etc etc etc...all of these simple yet important words let you know that the D&D you loved from way back in the 80's & 90's has been brought back to life or unlife and updated.