Pick and Ban Phase Idea

I have an idea that I think would be nice to have in the pick and ban phase. At the top of the champion list, they should add tabs for each champion role (ie: tank,support,assassin,etc.) that when clicked on, would filter the pool to help you find the right champion for what your team needs. I'm sure most players know all the champs and can easily find who they're looking for but, I play a bit of everything and in the heat of the moment when there's not much time left to pick, its hard to focus on all of them and then just tunnel visioning and picking someone that you see that might work. So you could say "Ok, my team could really use a tank" instead of scrambling through the list looking for who would be a good pick, you could just click on the tank tab and make it a lot easier to compare your options.