Why there isn't any Support AD itemization? My thoughts about it inside

Many people won't like this idea because it's "off meta", but I really believe this would be completly healthy for the game and even encourage new picks. Or if you don't want new items then make new enchantments for sightstone for example. That would be great.

Some picks like Pantheon, Ashe, Jarvan or Gangplank can be perfectly used as support for example. All of them have CC, harass, poke, peel... some even have steroids... Simply they aren't picked because of the lack of itemization. I really never understood this. Of course it should be studied well to not provoke a double ADC lane (Yes Ashe is an adc but she can be played as pure support, her passive even fits more on that role instead adc), but this is something that's missing on the game.

I mean, would you love something different on competitive play? Why do you think UoL had all that hype? Because competitive play needs something different. That's why AD Support items would help on that. As well stopping nerfing Sona Cough cough. Encourage new itemization Riot!