I believe this ought to be currently covered. When a new connection is added and we're not in the low RDY situation, `balance` is called. When balance is called, it will see that it's in the low RDY state and then `balance` will be called every 1.5 secs. Similarly, if `balance` is in the low RDY state and connections drop out, it should go back to normal conditions as soon as `balance` is called periodically.

Conspicuously absent from the test cases, are test cases for ReaderRdy so I should add some of those now to cover exactly the case outlined above.