I do not know about what most Washington fans *thought* about Burakovsky, but I remember most of the posts were of the "good riddance to bad rubbish" variety. I suppose it only makes sense that the nay sayers come out to pat each other on the back, since a trade may appear to be a validation of their assessment. Wings fans re:Mantha are no exception I think. From what I recall, the complaints about Burakovsky were mostly about how ineffective his game was, not his unwillingness to try.
As for Vrana, I am a bit more concerned about him than I was about Burakovsky because his game seems to be less varied. He is deadly off the rush, but he just doesn't seem to know what to do in other situations. Sort of Kessel - lite perhaps? Just off of my limited viewings of him. Looking forward to seeing him on Detroit, fingers crossed he can do what Burakovsky did and blossom with the Wings.