JusticePoint gear is pretty worthless imho.
I was maxed (4000) when cata hit, when I ran to the vendor I got a head + gloves for the guys.
The only way to get new JP was running heroics, which was impossible with the rest of the gear.
Meanwhile I've raised the rep to exalted on all factions, and got the i359 gear you can get from them.
With that gear, it's possible to complete some heroics, and get chaos orbs.
While farming those orbs, heroic i346 stuff drops, which is better then the gear you get at the JP vendors.
Only the shields are usefull, but can also be replaced when the orbs are abundant.
And with that, I'm back at 4000 JP and can't do shit with it, because I got better gear already!
Now if they only would let you buy orbs for say 4000JP, i'd be happy.