@Senburu Your plan seems good. But you missed some crucial details. First, they mentioned earlier that right now it's time for the president impeachment which means the media won't cover their story. Even if they do it afterwards, the uncles have enough influence to manipulate at least 2 major news channels.
Secondly, most supporters of Dojun in the company right now, he has inherited them (or got as a reward) from his grandfather. Those people are hardliners who won't let Sunyang group to split. So, rallying them to do the separation holding thing doesn't make sense.
I liked the politician part of your idea though.
I agree that Dojun is being unusually passive, so it will be interesting to see how he plans to weaken his uncles' positions.