Love the wording on Neutral Good. Hope that stays into the PHB.
Neutral is well-worded, and seems back towards 4E-style unaligned, when in some playtests it had been a bit sketchy and near to the silly kind of Neutral from 2E.
In fact, you know what -
all these alignments are best-worded alignments I've ever seen in any edition of D&D. So far 5E is looking great in what one might call the "Arts" part of D&D (if the mechanics are "Sciences"), hope that continues because then we'd have seen an area of D&D straight-improve for 5 editions.
They're so well-worded, I'm kind of mystified that no-one explained them this well in previous editions. Less is more, apparently. Whoever wrote these should be applauded.
EDIT - Not sure how comfortable I am with the the whole "Good gods create free-willed races, but Evil gods create races with a strong magical innate tendency to evil" deal. That's not fluff that was strictly true in any previous edition (certainly not of all evil races), and kind of reduces them to World of Warcraft-esque "MAGIC MADE ME EVIL!!!!" figures.
Also it totally doesn't jive with the fluff on the alignments of Dwarves, Elves, and Halflings, with former two tending towards Good (Dwarves seemingly more strongly), and Halfling being nearly all LG.
Sketchy. Think that should be world-specific, not a general assertion.
In fact I am definitely uncomfortable with this, especially in the general progressive context and that they specifically say even a Good member of one of those races will be constantly tempted by Evil. It seems like something from another age. It's boring and trite, too, because it's magic that's doing it.
Also this hard-codes the gods as definitely, actually, no questions creating all the races, rather than that being a deep-past thing which is open to question. Which is again a bit cheesy as a general assertion.
EDIT EDIT - It's not QUITE as bad as I'm saying because I like the "To make slaves of them" rationale, but I'm just not vibing with it. Breaking those chains would make a great campaign goal though... so I guess there's that.