As both an end-game raider and boxer, I'm not sure how much I like this change. On one hand, this makes it trivial to gear up a new team. On the other hand, it makes best-in-slot items available from heroics. The raider side of me is upset that I've been wiping in Ulduar for months to get conquest badges, orbs, tier pieces, and spent a ton of gold getting the ulduar crafted items. Granted, this change will come out in 3.2 when those items will no longer be best-in-slot, but it still seems like a huge jump. I'd prefer that they just did it one tier at a time similar to how PvP rewards drop one tier at a time. Make heroism badges obsolete and only valor drops from heroics. Then in the next patch up it again to valor -> conquest. Having three tiers gives people more incentive as you have a "starting" set, an entry-level raid set, and a high-end raid set.

That said, come 3.2 it will be really easy to gear up your characters:
Head: T8.5 (58 emblems)
Neck: i226 amulet (19 emblems)
Shoulders: T7.5 (60 emblems)
Cloak: i213 cloak (25 emblems)
Chest: T8.5 (58 emblems)
Wrist: i213 bracers (60 emblems)
Gloves: T7 (60 emblems) OR T8/T8.5 (Emalon)
Belt: i226 belt (28 emblems)
Legs: T7.5 (75 emblems) OR T8/8.5 (Emalon)
Boots: i213 (40 emblems)
Trinket1: i200 (40 emblems)
Ring1: i213 (25 emblems)
OH: i200 (25 emblems)
Relic: i213 (25 emblems)

That just leaves 1 trinket, 1 ring, weapon, and ranged (for non-relic classes) being unobtainable from emblems (unless you buy the heirloom weapon/trinket, which at level 80 would be pretty dumb)

The one thing I'm curious about is whether they'll adjust prices up/down for certain items. For example T8.5 chest is 58 emblems - T7 is 80, conquest belt is 28 - heroism belt is 40. Will they drop the heroism one to dirt cheap, up the conquest one, or just leave them the same and make the old ones completely worthless?