Custom tags for champions

You know how there's a search bar in the champion select screen? Wouldn't it be cool to create custom tags for champions that you can search up through that? If I wanted to play Mid Lane, I can type that into the search bar and get the champions I tagged that I feel comfortable with in Mid Lane, and pull from there. Maybe I could type down what champions have Hard CC, AOE Effects, or Single Target lockdown, all so I can easily access what champions can round out a team comp best. I could change what champions are treated as Fighters and what champs are treated as Tanks from the search bar to fit my preferences with those champs, or I could put together a grab bag of champs and have a comprehensive list of Junglers that I'm confident in. I always thought it would be nice to be able to sort and classify my slowly growing champion pool in a manageable way that I myself set up.