I'll note that these posts are often written quickly, I'll agree that having two means someone thinks both aren't up to the task by themselves.
When you say: "I'm not saying they're unqualified"
its typically better to say nothing if you don't know (why are you telling us what you are not saying.). You're also not saying they are qualified.
Of course there are various examples of multiple leaders being successful, but that implies you trust Activision and Bobby Kotick to give them the opportunity to do right, which the poster does not.