i've been using the macro described by the OP (normal castsequence, including Earthshock) and LvB on a separate button and it's working well for me.
I've also added lifeblood (added haste) as another separate /click button

all in all my solo dps improved from 3.8k to 4.4k on dummies since this patch.

my paladin is another story however, but he manages to still keep agro