Currently Wrath of the Lich King new players/alts can grind heroic instances to their hearts content and skip Tier 7, 8 and with enough time can also skip Tier 9. It never made sense how simple it was to grind these and achieve you better gear.
How are Blizzard going to make Justice Points work in later Cataclysm Content?
(Since Blizzard seem to want to throw new players into end-game raiding, I suggest they control it more)
I personally hope that:
-the Justice Points earned from lvl85 Heroic Instances remains at a constant.
-the Justice Points earned from Raiding Instances is different depending on the item level of the loot inside.
-the Justice Points cap is increased in stages as later raiding content becomes available.
Example:
lvl85 Heroics give 10 Justice Points per boss. ~1000 J.P's for Heroic Instance level gear.
First Stage of Cata Raiding gives 20 J.P's per boss. ~2000 J.P's per item at this level.
Second Stage of Cata Raiding gives 30 J.P's per boss. ~3000 J.P's per item at this level.
etc etc etc.
So, higher item level gear is achievable from farming Heroic Instances however it should take longer than those completing the appropriate content.