New item level 655 Raid Finder sets have been added, along with set bonuses. These sets are 6 slots rather than 5.
Now ofc ppl will say you don't rly "HAVE TO" get 2 set of the LFR together with the 4 set of Heroic but the combo of 2 set from LFR "boots" + "sholders/gloves" vs any normal or heroic pieces will most probably be better.
Fun fun fun