Demon Blades is much stronger than intended in this build; this will be corrected before live. The intended change was to increase the Fury generation to allow Demon Blades builds to use Chaos Strike more often than they had been. But the damage done by Demon Blades itself is in line with the old amount of Fury generation, and too high for the current amount. We also agree the talent shouldn't be the highest stationary DPS option on its row due to its passivity, and it will be brought into line for the row.
There is no change to Mutilate damage at level 110 in this build. Some data changed under the hood, but tooltips should still be showing the correct damage in-game. This applies to a number of other weapondamage-based attacks on various specs.