From datamining, the gear right now is 554 Heroic, 541 Normal, 527 Flex, 521 LFR, with only Normal and Heroic getting TF (or whatever they're going to call it).
But, GC tweeted they might do 566 Heroic 553 Normal, 536 Flex, and 528 LFR.
What's better in your eyes? Obviously a lot of people would like the 1st one, where Orgrimmar LFR gear is lower than Normal ToT so technically Normal raiders won't "have" to run LFR, and maybe Flex if they want to
But, either way, what's kind of strange in both cases is how....low flex gear is, thought it's be closer to Normal than LFR. Maybe Flex will be easier than we thought?