Filter completed dramas from search results

If I'm browsing dramas, searching by genre, I have to go through pages to find results that I haven't already watched, or decided not to watch. Therefore I think it would be helpful to have a filter section blocking listed dramas (like there is a section for country and genre, rather than selecting to include (double selecting to exclude) "China" or "South Korea" you would select "Completed" or "Not Interested".
This way you could also search through your plan to watch list by genre etc, if yours is long like mine; effectively reducing your search to things you already consider worth watching, save in which order.