I think my favourite quote from second edition was in the campaign setting "Horde" (1989). From memory, it went something like this:
Owing to the vast distances in Kara-Tur, the overall size of Kara-Tur has been reduced by 1/3 to improve play. The hexes formerly 60 miles across are now 40 miles across...
I think that about sums it up. So many 2e products were hardly tested, playtested, or in fact barely even thought about before they were sold to an unsuspecting public, it was acutely embarrassing to waste money on them.
Oh sure the artwork was slick and glossy, if a bit soulless, and at least the initiative rules worked. But basically, my feeling is that where it was good, it wasn't new, and where it was new, it wasn't much good.