Can someone explain what happened with Bernie Ecclestone?
Last I'd heard in 2017 he was basically completely out, given basically a non-role with the new US 'stache guy taking control but Bernie appears to be the key figure again, has there been some kind of counter-coup or something?
Yes, Formula 1 was bought!
2016 Bloomberg reported that Liberty Media had agreed to buy Delta Topco, the company that controls Formula One, from private-equity firm CVC Capital Partners for $4.4 billion in cash, stock, and convertible debt.[6] On 23 January 2017 Liberty Media confirmed the completion of the acquisition for $8 billion.[7][8]
Bernie was getting old and letting the sport get stale.
This new US firm intends to bring Formula1 to the masses and energizing the youth of the sport. As such, just watch any episode of "Drive to Survive" on Netflix.