I don't think it's entirely fair to say the BBC did not want to take the Pi on. Rather it would have been inappropriate for the BBC and the government driven digital initiative they were involved in to do so.
The Pi, despite the Foundation having a charitable intent, is none the less a commercial venture and the BBC and initiative would have faced accusations of preferential treatment to a specific commercial concern if they had simply adopted the Pi rather than developed their own product to fit the initiative which had started before the Pi was released.
Besides, if the Pi had been adopted by the BBC and initiative, that would probably have required the surrendering of IP and ownership of the product and that would likely have meant the Pi would not have developed as it has, would not have become the thing that it is.
In many ways the BBC and initiative not taking on the Pi was fortuitous and for the best. Rather than making the Pi more of a success the unintended consequences may well have been to stifle its development, limit its appeal and availability.
It wasn't the wrong decision by the BBC. It wasn't a bad decision by the BBC. People just need to let that issue go.
It would be interesting to hear what the full story was behind the micro:bit and pursuit of that venture but it's got little relevancy to the Pi or Eben.