I think Ippe is just straight wrong, his prediction assumed he could control the Plant. When it probably isn't even a thing that ever happens. He might have predicted the possibility of control, based on some lower level fusions, but not something of this high level. He's merely part of it now. Gave up his humanity to be a Hood Ornament. I doubt Kinoko's blood is a factor at all in his lack of control.
And yeah, confirmed from last time. Kinoko is literally too strong for any of this to be an issue. Not a Job, yoink, gone. Doesn't consider any of this to be a danger. Just "child's play".
And I'm shocked no one is talking about Pyonko's Awakened power. Nudity Power.