New one here...
I started watching just 2 weeks ago this drama so I don't care with who Sunny end but I found sad the story had major changes throug the middle one can feel that the plot is not the same as in the beggining, notice thay NWS (CJH) was lesser important in the drama and they gave more relevance to the Emperor (I do like him, SSR is so far extraordinary, it remind me sometimes his previous work in Return).
Oh Sunny and the Emperor had a korean nickname... it's possible the story changed due to korean viewers? I don't know but if they have a nickname and had a strong fanbase that could explain the whole change in the plot.
I hope this drama gives a good closure, the bad ones need to be punished.