I think FB acquiring Twitter is actually the best end result. Facebook has patience knows how to give independence and allow for the product to evolve. Instagram and WhatsApp are the best examples.
Google on the other hand has demonstrated that they have no idea how to compete in social. Buying Twitter gives them a property to play with at a discount.
Aren't self driving cars the next big thing anyway? Who cares what's on Twitter when you can sell ads in the car while I go from point a to point b.