Wondering as well. Soul Effigy is a weird skill in general and was hoping they would tweak it or rework it. It's too awkward and has no synergy with drain fillers. Using it just turns most of your gameplay into dot refreshes, especially if you're running Siphon Life and Contagion.
edit: This is arguably my biggest complain with Affliction. No talent combination actually feels good to use. If you don't want to watch 4 dots on minimum two targets (main target plus Effigy) then your single target does to shit, but any other combination for any other QoL or AoE boost means you lose it.
Aff largely feels like it's stuck in a spot of have fun or do damage and Soul Effigy is a big reason for that.