Sandy,

I consulted with our plant pathologist and the consensus is that a fungal 'canker' on the branches is likely the condition affecting your bushes.  The leaves are not being nourished so they then show discoloration and eventually die and fall off. I'm attaching some information from Cornell University on this that you can compare with your plants.  

There are also fungal infections that start in the leaves and work down to the stem.  In either case removing the infected material is important.  Prune away all dieback canes and destroy them if possible (ie: hot compost, burn according to local regulations, bury) and if not remove them as far as possible from your bushes.  Th leaves on some of the other parts of the plant already seem to show some spotting so it may be that you may unfortunately see more dieback; carefully look at those stems for signs of canker.

The stress of transplanted may have made the bushes more susceptible but you might also want to do a soil test to be sure the pH (level of acidity) of the soil is between 4.5-5.5.  You can also look at the nutrient levels to see if there are recommendations to amend the soil or if you just do an 'at home' pH test, be sure to mulch and apply fertilizer in the spring.   This will help improve the overall health of the plants so they can better withstand diseases.

As for you neighbor mentioning fire blight, you are correct that the disease commonly referred to the way does not occur on blueberries.  However, the term 'blight' is frequently used for many plant diseases that cause leaves and twigs discolor and die back. 

An entomologist helped to identify the insects.  She believes they are likely psoccids or 'barklice' - they are not harmful to the plant thankfully and are not involved in causing the canker.

Thank you for reaching out with your question.