It was probably just nerfed because it is an AoE Chi drain over time. Most BM's used to use it all the time in mass PvP, now not so much. But yeah, you're not losing it, you need to add a bit of str for it to even work.
EDIT: I just want to add this genie skill has been like this from my experience server-to-server, so it was most likely nerfed by PWI and not Agatio.