Blueberries any hope?

I dug up a struggling blueberry last year and stuck it in a pot.  It lost all it's leaves and I assumed I had killed it but it has limped through this year with a few new leaves and I'm assuming will improve again next year. 

In short, it might recover but your patience may run out first.  Might be worth giving it fresh ericaceous compost before spring to give it the best chance.

Yes, don’t give up on it. After a holiday 2 summers ago, I came back to a totally leafless frazzled blueberry in a pot. I pruned back the crispiest stems and gave it lots of water through the autumn. Then in spring I mulched it with well rotted manure and gave it an ericaceous feed (slow-release granules). It had loads of new shoots last year and a few berries. This year it was super-productive. Good luck with yours.