I like to watch period shows and I don't look for airtight historical accuracy in them. I leave that to NG or Discovery. As long as the producers don't claim accuracy I'm fine. What I like to see are historical sets, costumes and good drama. In short: entertainment. And that I got. Didn't like all the witchcraft stuff and you really don't see a lot of the bloody stuff. Battles looked rather small.
I'll say this though: if only half of the events are true (forgive me for not knowing English history to the T) with all those betrayals, switching sides, backstabbing, marriage and re-marriage you wonder how they were ever able to built such an empire. No one really does something for the good of the country. They all have ulterior motives and personal agendas. Doesn't seem to have been many honest men or women around. But that's what makes good drama I'd say.