A couple of quotes, unattributed, found in five minutes' perusal of my flist round the time of the book's release:

Albus pretty much had to die when he did. His Stuishness had become overwhelming. I can't be the only one that was irritated by how often he had to remind people how smart he was. Also, this book pretty much confirmed that he is the twinkly sun by which Jo's world revolves. Mr Exposition indeed. You were a shrill moral voice and I am ever so glad you're gone. Rest in Pieces, Albus you schmuck.

Dumbledore deserved everything he got and I am happy that it was Sev who got to deal the blow, but knowing Her she will take it away from him in the end by saying some damnfool shite about how it was what Albus really wanted.

There were more and snarkier, I assure you...