Originally Posted by
Fleugen
It is, however, sensible given the cyclical nature of MMOs.
WoW is expecting another expansion once this one completes, and as with every expansion before it, all previous content is pushed into the "old content" umbrella, while the "new" expansion content becomes "current content." When things become "old content" they are forgotten about, and no more scaling is made in order to cover that "old content" - It's only made to cover the NEW content.
Go ahead - Make a raid of 40 people and try to do Molten Core on Retail WoW right now and see how well it goes. You will demolish the place. Hell, you can do so solo if you feel like it. The game plays MASSIVELY differently as "old content" than as "current content." This isn't just due to levels, either, you could take characters AT LEVEL who are IN Molten Core gear, and it will still play MASSIVELY differently. Classes, spells, gear, stat scaling - It all changes from expansion to expansion and patch to patch.
As such, experiencing things while they are "current content" is important in WoW in order to see what experience people intended. Some people go so far as to say experiencing things when they are the MOST current content, as in the most recent patch, is important. (And the same argument makes sense there too - Classes and raids often receive major changes each patch even within a current expansion. Clearing a raid when it first comes out, and clearing a raid at the end of an expansion's lifecycle, are two VERY differing experiences.) This then leads to even same expansion content getting reduced, in order to allow players who didn't start at patch 2, to catch up to patch 2 fast enough to be able to participate in patch 2.
Because if people had to do a six month grind in patch 1 content in order to get the stuff from patch 1, to even BEGIN to start patch 2, that would be HELL.