As I've written elsewhere, I think just having a way for dynos to refuse load (by not accepting a connection, or returning an error or redirect), such that the

As I've written elsewhere, I think just having a way for dynos to refuse load (by not accepting a connection, or returning an error or redirect), such that the load tries another dyno, will probably achieve most of the benefits of 'intelligent' routing. And, preserve the stateless scalability of the 'routing mesh'.