For me, I am still using the talk application for android as I have escaped from getting the hangout app installed automatically. But, there are users who have updated that accidentally; there is no going back. These people are just hitting their heads with the review section of the play store for this application.
At last,I will simply say that Google has released some thing immature, replacing the good and matured product. Don’t know what was the rush and when Google will show some relief to its talk users.
Best of luck … and happy chatting.