This game needs more items to fulfill more roles

And I doubt that this post will be popular, but there are a lot of things that could be added to the game. Currently it seems like Riot is kinda doing this already with the ADC items reworked with new ones added, and the new assassin items. But still, there are a lot of things that could use some filling out. Like for example, if my ADC is being pounded by a mage, I can build Lockt of the Iron Solari..good stats, gives an AOE MR buff, can be used to shield allies. If my adc is being pounded by an assassin, or another adc...there is not a lot build wise that I can do to help my adc. I can build Frozen heart, but with assassins not using AA's and most ADC's killing squishes with 3 shots when they are fed...that's not helping much. the most I can do is tank up and try to annoy them into attacking me and not the adc...that's not a great strategy