So what's the difference between 10 man boosted and 25 man nerfed?

@Amaxe

The issue with 10m vs 25m was actually that originally they stealth nerfed both the 25m and 10m drop rate. People were generally accepting that this was a justified nerf to 25m, since some guilds were already working on their third staff, but completely unjustified in 10mans where it's still mathematically impossible to have even one yet (due to a lower drop rate of essences in 10mans). The change they put in originally meant that, by some calculations, the earliest any 10man guild would be able to complete their first staff was something like December 27th....by which point we would almost certainly be onto the next tier of content. Before this happened, people were already complaining that 10mans had to wait too long compared to 25s to complete their staff - and this just made it worse.

They listened to the complaints and feedback and reverted the drop rate for heroic mode back to what it was at the start of 4.2, They also buffed the drop rate in normal slightly.