What if Ranged and Melee items were separate?

So, I was looking at a thing about the and people saying it should be melee only. I have trouble with some of these items because there are some that are melee only some that are ranged only... they don't say which is which and it doesn't make sense.

Someone with a sword can't shoot bolts but someone with a bow can somehow use a sword at range. I get it: items need to be balanced to fit multiple groups. Why can't we do a Ranged/Melee classification and each champ can only see the items that they can use. Want to do something like on Tristana (like I normally do) then copy it to the Infinity Bow or Infinity SwordBow or something. This way there's still the but also has a version for ranged. The items wouldn't even really need to be changed unless there is a balancing problem, any item that doesn't need to be balanced only need to be duplicated.

Also, I am hoping the update to the client includes something on the Item Sets tab that we can filter items better. (lacking any filter option for Armor Pen or Magic Pen, as well as limiting maps or items able to be used to champs (or not - any item set can have Viktor's items added, even if they can't be seen or used).

Edit: By this I'm saying there should be 2 classifications as champs: Melee or Ranged (mages would fall into ranged or unable to use melee/ranged items). Then have 3 classifications of items: Neutral, Melee, and Ranged. Melee champs have access to neutral + melee items and ranged champs have access to neutral + ranged items. Could even be done with an extra category of items for Mages.

Majority of items would still fit as neutral, but we could keep things like as a melee only item, while ranged champs have ranged items that actually fit them better.

If Riot wants the champs to be more unique, why can't we have their item selection be even remotely unique?