3e sustained, in one form or another, more than 15 years of being a popular and widely played game. No one denies today that it is a game without serious, deep, inherent flaws. Some like it despite that. Some fix it (see DSP's Spheres). Etc. But the flaws are there and despite many denying their existence for so long, now they're openly admitted.
5.0 stans denied for years and years that there was anything wrong with its DMG. Then the switch suddenly flipped about three or four years ago, and it became "yes yes yes we know the DMG is crap, can you please stop talking about it." Which is one of the reasons I won't, by the way; I refuse to be shoved into the position of having been told I was a fool to distrust and then told I'm not allowed to point out the problems because everyone agrees now.
I think you'll find that, once the edition is at least partially in the rear view mirror, people begin to be a lot more honest about its flaws than they were when it was the new hotness.