I'm fine with making him a villain again. My complaints about Malcolm Merlyn is when they don't make him a villain. During those times, the writers don't seem to know what to do with him. Having the series end how it began with Merlyn would be fine with me, if they come up with a clever way for it to work. I actually thought making him Ra's was a good idea for that reason but they only rarely developed that. So he doesn't have to die this season as long as Ollie's goal by the end will be to stop him.