Alex could not trust his brother again after giving him so many chances to make the correction and failing terribly at it. But neither did he intend on leaving there alive.
For the first time, Alex was willing to give up everything, knowing Joanna could survive because her company was doing amazingly well.
Logan would not be foolish to leave Dion penniless, but also, Logan would face a big issue because of all the shares of the various family members. Even Violet's family had shares in there because of their collaboration.
He hadn't even remembered to tell Joan about it but knew Violet would.
Even if Alex signs off the company, only a percentage can be managed by Logan because of family policies.