well we don't know exactly how involved Gabe Newell is with the actual running of the company now a days or how do they going about their governance.

From what I see it seems like the culture of the company is shared between the leadership roles so it might be possible for the company to continue doing as it has been doing after Gabe.

I think the people at valve are smart and they understand their business and the company very well and that this issue is being taken seriously too.

Good governance exists, it's just that for most companies there's not really an interest in having that because it gets in the way of personal interests of people that are already entrenched in power.