So true, but also I think that A-B players can be a bit too general. I've found that there is people that will execute flawlesly but only when they know exactly what to do, while others are able to fill gaps of your idea and execute with just general guidelines. The later are the ones you need when your team is small (A or B players), but you'll need more of the former when you get traction, market fit and your organization grows.