So you neither have any first hand experience of the 1.5-1.12 changes, nor have read the sweeping changes listed in various threads and webpages, but feel comfortable saying that the cave move was the only “real” difference?
Here, have a read. This one does not even cover every change.
Here, have another which speaks directly of the vanilla changes:
Hell, here’s another from the OLD forums:
https://web.archive.org/web/20080808013348/http://forums.worldofwarcraft.com/thread.html?topicId=8557297376&sid=1