Yep. The Story of the bad index and poor DM tools.
Truly an epic of our time.
You ... did see the word "most", right? So, if 300 issues were raised in this thread and 160 of them were essentially not an issue in stroy driven games ... that would be most. Right? You brought up 2 examples. Were there more than 4 issues raised in this thread? And frankly - a bad index is significant enough to be an issue for you? I've never really noticed the index being weak, and in today's digital days where many of us google a rule before we look at it in the book...
Not to mention objectively wrong. I see tons of "issues" in the game, and I'm ALL about Story in the game. And I'm only one example. I suspect nearly all of us are big into the story. It's just a foolish thing to say.
I went through the first 20 pages of this thread and the vast majority of the issues raised are not a problem in my games - at all - and for many of those it is because they tend to be issues that pop up when DMs ignore story - well over half the total "issues". Each of the things I saw there had been brought up countless times before and the argument I raised has been played out over and over and over.
The DMG as a book (more than just the layout) is the one I come closest to agreeing with, but I do not think it rises to an issue. I'd do it differently, but that does not make the way they did it here wrong. If I did it, half the DMG would move to the PHB, and there would be two DMGs - one that advises DMs on mechanical operations of the game and another that focuses on storybuilding, worldbuilding, and acting techniques.
For the rest of it, I - and the players at my table - do not seem to have any issues with any of the stuff in the thread. Some players have noted some of the criticisms raised and said they wish it were different, but they're still having fun with it as is.
Think of it this way: WotC decided to make a new edition. They make money if it sells. The best way to sell it is to show people how much better it is. Right? You don't sell the new year's car model by showing people it is just like last year's right?
They had lots of research, experience and talent aimed at coming up with the next edition ... and what did they decide to do? Mostly minor tweaks.
That makes it a harder sell, right? Come see the new edition of D&D - the same as you played for the last decade with a few tweaks! Now give us your money all over again!
This is the smallest change between editions we've ever seen. AD&D -> 2E (12 years), 2E - 3E (11 years), 3E to 4E (8 years), 4E to 5E (6 years) ... all much larger changes. Here, despite being in place much longer than either of the last two editions - tweaks.
5E works really well. No major issues.
Well, strike that. I will say I see one major issue, but I do not recall seeing it in the thread's first 20 pages. In AD&D through 4E they supported psionics. It became an integral part of many campaign settings. Many of us built homebrew worlds around the rules they provided, and that meant we created elemtns that revolved around psionics ... and WotC left us high and dry in 5E. That was an issue. They should provide some support for psionics within a year of the next edition release, even if it is just a pdf with 'enough to get by' rules. That is the only thing I'd call an issue for 5E.