See the other posts about this subject. Devs said they dont want to add LFR to cata.
LFR is not needed in cata since we now have Heroic + dungeons that allow people to get better loot then what is going to be available in LFR.
LFR drops 384 loot with 390 loot dropping off the last 2 bosses.
Heroic + dungeons give currency to buy Heroic raid gear from the previous raid (in this case it would be Firelands) Which is 391-397 ilvl far exceeding the ilvl rewarded from LFR.