Fire Rift AI Change?

First off, I have to say I'm very happy with the new changes. I run

Hwahee / Soha / Xiao Lin // Stella / Tarq / Zaiross (L)

and I'm now able to pull at least SS 75% of the time on auto. However, in trying to take a closer look at what is making my runs fail, I think I noticed a change in the AI for fire rift.

Zaiross and Soha are pitifully stupid in groggy phase and just blow their AoE attacks at will. However, I started noticing them using AoE attacks outside of groggy when there are no minions. I don't believe this was happening before and I think I even recall hearing that many monster AI had been tweaked to save AoEs for multi-target in fire raid.

Anyone else seeing this? Does it sound right that this is actually a change?