Well, perhaps I'm not explaining my question very well.
Between tiers of difficulty; there is typically a 12-13 item level difference in the gear that drops; that used to be the way you determined (and even the way many third party sites determine) what content should be optimal or trivial for you.
With the item level of stuff from heroics being 463 and the item level of "normal" mode Mogushan being 483 -- that is a 20-item level difference; which in most cases is too much of a jump (bosses might hit too hard scaled to gear/dps budgets might be higher than possible)..etc etc.
LFR seems to bridge that gap in this case since its ilevel is 476. It was just odd to me to stagger LFR behind releasing the normal mode when it would just seem most woudlnt even be able to logically clear it
Don't forget that 5 mans aren't the only method of gearing up. Vp gives gear for every slot and seems to be raid level or LFR level (I forget which) there is also crafted gear which would be raid level. So you certainly don't need LFR to gear up for normals.
Is there a vp cap?