I doubt we will ever know the actual truth of how much of the alleged espionage is spearheaded by MHJ and its extent but tbh, just the fact that other ADOR VPs already acknowledged their involvement is enough for Hybe to demand MHJ to step down as CEO due to weak leadership. It really doesn't take much justification to replace a CEO - Hybe would just need to answer to their own shareholders, but even the claim that a sub-label CEO was not aware of top execs harboring escape plans would be enough to convince HYBE shareholders that she's a liability risk.
What's happening right now is that Hybe doesn't seem satisfied anymore with only MHJ's resignation, they are going for full character assassination and possibly criminal charges (maybe to send a message?). Like I said earlier, there's no world where MHJ remains in HYBE. Having her stay would be a slap in the face for Belift at this point; the tensions between the subsidiaries right now must be insane.
MHJ played this badly tbh. Her initial statement on Illit totally lost me - it's a valid complaint to make internally but unhinged to use as a starting public statement. "Plagiarism" and "Copyright infringement" are words that have actual legal meaning, and she used them the way a teenage stan account would. It undermined her credibility out of the gate.
It would've been much better if her first statement was centered out of concern that New Jeans image and IP was not being properly protected, and in fact Ador suspects Hybe of possibly even being complicit in eroding the New Jeans brand. Then after Hybe started their media campaign, she could release her internal complaint with the caveat "I didn't want to make this public out of respect for all groups mentioned but felt I had no choice since Hybe is waging a public opinion battle."
With the way she acted instead, I don't see any way out publicly.