I'm sorry, but I can't take "I killed it with Collodi and Avatar Zoraida" as a viable argument to indicate a model's power level. When you're getting upwards of 20 AP from 1 activation, where 80% of those can be paired attacks, you're going to kill whatever you focus.
And I am of the personal opinion, while some others rightfully disagree with me, that Izamu is one of few Rezzer models who can maintain entire self-sufficiency. Many, many of our models are poor on their own (Belles, Canines, Punks), and gain tons of efficiency as their support level rises, while Izamu's "curve" of support-power is much, much less inclined (Disregarding masters). Often times, I run a 25SS list with Nico, Dead Rider, and Izamu, as the entirety of that minion pool is the pinnacle of Rezzer self-sufficiency.
(My apologies if I seem bitter or biased towards Collodi. I try, as this forum post would indicate, to refrain from labeling models overpowered or underpowered, but I cannot rationalize Collodi's balance in my own head. That's the last I will say on him; This is an Izamu thread, and I want to keep it that way I just can't understand Collodi's power level being where it is at the moment)