How about they take it back to how it was in wrath?
Without it actually being wrath, it could work.
Wrath didn't suck because 10's and 25's didn't have the same loot. Wrath didn't suck because 10's and 25's didn't share the same lockout.
Wrath didn't suck because your group of friends couldn't be social enough to group with 15 other cool people to be good.
Wrath sucked because they didn't make it difficult enough for the things they should have. Tuning fights so people are able to spam trade is dumb, tuning fights AND creating a raid browser to pick up people is dumb. Tell me how many Gruuls/TK/BT/SWP pugs you saw going on mid BC?
Just give us the better loot back on 25's. Lower the difficulty of 10's, and let them drop the same amount of gear.
You have the easy mode, you can have the easy loot. Easy = Easy.... Not easy = 1337.
Where I can say 10mans are a bit harder for general raiders, because of raid comps, and probably that much more unforgiving on heroic. 25's are in no way easier for the core of your raid making things happen. Your officers, leaders, and even the healers suffer so much more on 25's than the average raider does on 10's. If you're browsing logs, recount, or whatever, you have 6-8 people to bitch at for getting hit by a shadow crash, or puking corruption all over the raid. You cant say you can just simply "carry" people, it doesn't work that way on progression bosses yet. If guilds are doing heroics right now, on 25 man, they are far beyond carrying garbage players.