The transition between 2e and 3e was so good because there wasn't any world shaking event (that I'm aware of) it was just a case of "These are the rules now." Mind you, I did enjoy reading about the time of troubles, never got a chance to play a game set during that time though.
I'm told, by someone who read the book more closely than me, that the 3e book did make a number of changes, like Elves were no longer leaving like in Tolkien, and Dwarves started breeding properly so were no longer dying out. It advanced the timeline, only by a year or two, from 2e.
The "time of troubles" adventures were the biggest piece of 2e "story-driven adventures" crap that I've seen, a big reason I gave up playing a lot of D&D not long after 2e came out because adventures went from simple concise site-based dungeons or similar, to over-blown novels trying to be an adventure. In the "time of troubles" adventures, the PC's get to watch gods battle, led around by Elminster, from near Thay, to Waterdeep, with an NPC who is better than any PC and must accompany them because she turns into Mystra at the end of the 3rd adventure. And another NPC also turns emo mid-way through and by the end he's the new god of murder. Honestly, I read all three adventures again recently, and struggled to see where the actual "adventure" was, unless the players got bored and just randomly attacked NPCs or Gods, and even then of course the silly PC's can't win and yet they must be lead by the nose to see the scripted ending. So you see, that's one example of why some people don't like the FR. From what I figured out even in 1e days, that seems to be the Ed Greenwood style of DMing... (or if it's not, his real style doesn't come out in what he's got his name on).