Yes, regime change in Iran would benefit the entire world. But not by trying to do it with MEK.
I think the people would be fine with someone bombing Khamenie’s house and the majlis (parliament)while it was in full session, and the IRGC headquarters. After that, let the people take over.
Something like that would work. However, now the oil price is heading up https://www.bloomberg.com/quote/CO1:COM Saudi and Russia are happy.