First, this isn't a QQ thread. Basically there are a few problems with the game, some of which Blizz have acknoledged, one way or another. The rest, the community seems pretty strongly united on.
All players should see all content
Heroics are boring and too easy
Old raids are too easy
Old raids offer nothing of value (Mostly)
People don't know their classes
Correct me if I'm wrong, but these seem to be the things people are annoyed about right now.
As I see it, blizzard could solve all of these issues easily in Cataclysm with one design change. Basically, gear scaling from tier to tier at the moment is a stat gap. You wouldn't dream of running naxxramas at the moment because anything from there is a lot worse than gear from ToC or the new 5-mans.
This means people ding 80, and skip 2-3 tiers worth of raids so don't see content.
People outgear heroics by a mile, hence they become boring.
People outgear old raids by a mile, it becomes boring and hardmodes become trivial.
While hardmodes are trivial, they also offer no good gear (In most cases) so why bother doing them?
Why learn your class when you can be carried through content and get shiny new gear?
With less gear difference between tiers the effect would be:
People ding 80, don't automatically assume the first tier raid gear is awful, might actually see it.
People don't outgear heroics by a mile, they stay fun and challenging (ish).
People don't outgear old raids by a mile, Hardmodes stay hard and fights are still challenging.
Hardmode gear stays good!
People will be forced to become better raiders as their gear won't carry them through old content so easily any more.
Blizzard wins by more people seeing content, less people cancelling their subscriptions, and not having to put in -20% dodge requirements to raids etc
We win by raids/heroics staying fun, gear staying current(ish), and people learning their classes.
What do you think?