JP gear was never meant to qualify you for LFR thats what heroic gear plus the rep gear is for. Same thing at the start of every xpac.
And how is this? 4.3 required 372 ilvl and JP gear was 378 at that time. So with dungeon drops supplemented with JP gear you could get in LFR.
Now it is "intended" to have to get every slot filled in dungeons or by crafted or rep epics to get in LFR.
LFR was already in danger once people figure out how bad the new slot machine loot system works and now with this new improved inability to get in LFR except by regular raiders who don't really want or need it, it will be a ghost town.
(Start of every xpac) Im not talking about 3 patches in, we are not 3 patches into mop there are other ways to get gear for heroics and lfr you just have to work a little. Do the rep grind or just get heroic gear and you will be fine. The LFR item level is only 470 if you do both of the things said above you will have plenty of gear to get into LFR
You only have to do a week or so of either golden lotus (If you have crafting) or klaxxi to get gear to supplement heroic gear.
Edit: 463 avg ilvl for the first two, and 470 avg ilvl for the last three. (LFR raids)