I know it's not a lot of data, but hopefully this gives an idea. I also included item drops and how much they vendor for. To be honest overall it doesn't look like it'll be much of a drop. Still some, but not as bad as I've been reading.
All from 25man Heroic:
Marrowgar - 29g 28s
- Bulwark of Smouldering Steel - 12g 84s 98c
- Frozen Bonespike - 20g 99s 44c
- Band of the Bone Colossus - 7g 56s 23c
Lady Deathwhisper - 29g 81s 88c
- Broken Ram Skull Helm - 10g 67s 83c
- Cultist's Bloodsoaked Spaulders - 11g 20s 64c
- Fallen Lord's Handguards - 9g 84s 75c
- Primordial Saronite - 7g
Morchok - 73g 29s 70c
- Vial of Shadows - 45g 71s 31c
- Sporebeard Gauntlets - 10g 04s 98c
- Rockhide Bracers - 10g 08s 81c
- Mosswrought Shoulderguards - 14g 84s 82c
- Petrified Fungal Heart - 5g 34s 34c
- Mycosynth Wristguards - 10g 50s 70c
- Essence of Destruction x2 - 20s
Yor'sahj the Unsleeping - 70g 05s 97c
- Experimental Specimen Slicer - 36g 78s 29c
- Interrogator's Bloody Footpads - 15g 24s 54c
- Mindstrainer Treads - 15g 13s 30c
- Scalpel of Unrelenting Agony - 29g 64s 8c
- Leggings of the Corrupted Vanquisher x2 - 5g
- Essence of Destruction - 20s
Stone Guardians - 57g 71s 5c
- Stoneflesh Leggings 25g 00s 60c
- Jasper Clawfeet - 18g 65s 2c
- Ruby-Linked Girdle x2 - 12g 85s 82c
- Beads of the Mogu'shi - 17g 29s 51c
- Claws of Amethyst - 12g 90s 43c
Feng the Accursed - 56g 87s 21c
- Wildfire Worldwalkers - 18g 30s 37c
- Cloak of Peacock Feathers x2 - 18g 64s 28c
- Amulet of Seven Curses - 17g 29s 51c
- Hood of Cursed Dreams - 18g 91s 52c
- Legplates of Sagacious Shadows - 25g 17s 68c