I found the epilogue a bit treacle and tart really, too sweet and gooey.
Ron and Hermoine surviving a couple of decades of marraige? PUH-LeeeZE! I could believe Hermoine might have an unusually tall plaster of paris gnome in her garden or something, but sticking with him? And what about her huge talent? All under control as Ron expects her to be the stay at home housewife, wand out for dinner and dusting only no doubt.
No no, far more realistic would have been Hermoine as deputy minister for magic by then with Ron sniveling on about how she put career before him.
And Ginny's noted temper and handy destructive powers? Harry survived that?
I would have put the epilogue in the Leaky Cauldron with a slightly embarressed chance meeting between Harry and Ron, Ron is waiting for Lavender Weasley to finish her shopping and Harry is attending the book signing of his biography by Rita Skeeter, "Harry Potter, the untold story."
"Hermoine and Cho, who would have thought it?" Harry tsks. "Poor old Viktor, his career never recovered, turned to drink and Doxy Eggs. I knew Cho was dodgey, why else would she dump me, but Hermoine? Well well, someone must have really changed her attitiude to men!"
"Well Ginny is the best Captain the Colchester Coven have ever had," Ron retorts. "She says her stay in Azkabahn for hexing you during your testimonial match was an inspiration and a wake up call."
I hate happy endings.