The question of how these hotfixes will affect the encounter difficulty are still up in the air, but all signs obviously point to them being easier than when 3.0.8 was initially implemented.
Quote from: Daelo (Source)
We just hotfixed Sapphiron's Frost Aura so it should do the damage that was seen previous to the 3.0.8 patch regardless of the size of the raid or your server's performance. This should be 1200 every 2 seconds in Normal, and 1600 every 2 seconds in Heroic. You'll notice that the Frost Aura debuff you have no longer has a duration that refreshes. The tooltip also incorrectly lists the damage as occuring every second. The tooltip error will be fixed the next time we make a client patch available.
We also made a hotfix for the Heroic version of Malygos to add a small amount of time from the point when Malygos lands after Vortex to when he performs his Arcane Breath. This should allow players and pets enough time to reposition behind Malygos. The Normal version already had the additional time.