The most annoying part is I have no idea what it's supposed to actually be. The datamined info seems to match the tooltip, but doesn't match pre 4.0.6 values.
Which means either they intended to buff the DoT of Lacerate (which would make sense with the 2pct10 bonus) and never mentioned it anywhere in the patch notes, or all available information regarding what Lacerate should be doing is wrong.
I honestly don't know what's worse.

