I haven't checked any of the reaction to the first episode of Game of Thrones season 6, so I have no idea what people were saying online.
But I enjoyed it. Actually, I thought it was a very strong opening episode.
Of course, I'm not following the books, nor do I care to. I also don't really care about the splintering of the books/show, because I'm resigned to only watching the show.
I thought this season did a great job of reintroducing audiences to the most important story arcs, also had some good dialogue, some interesting scenes. The acting of those girls in Dorne is still terrible, but I can live with it.