Netflix writes the app so for this one you call Netflix and ask when they will update their app.
As to removal, I must defer to Samsung and Netflix. It varies with the country and firmware. Samsung usually walks folk through it.
I go into Netflix movies and shows and turn on subtitles, but they still will not display on the TV. I can watch with the subtitles on my apple TV but the Samsung doesn't want to display them. I have upgraded the TV to the lastest firmware. I Can't remove netflix and re-install. That feature is greyed out. Any suggestions?