That's the main point really, compared to Tanaan gear that you can reroll for optimal stats (Stats on LfR-gear are almost always sub-optimal and the set-bonuses are hilariously bad) and then upgrade it to 10-20 itemlevels higher than LfR, not to mention ilevel 705 items off Kazzak for certain slots, and i personally have almost no LfR-gear on my main at all, and i have run every LfR-wing that i could for those tomes for the legendary ring...