New fun way to distribute roles as 5s premade

So I was playing some normals with a couple of mates and it's the same story every champion select, everyone says "I don't know what I want to play". Well It's here I came up with a fun way to distribute roles.

When banning has ended you, following the picking order, click the "Random Champion" button to get a random champion. If first pick randoms lets say Leona he plays support role, not neccessarily Leona, but he plays support. Everyone does this and if you random a champion that fits a role which has already been taken you simply random another until you get a role that has not yet been taken, last pick will ofcourse play whatever role that's left.

I just wanted to put this up on Reddit so other people could try out this fun way of selecting role/champion. I hope my way of explaining it is easy to understand, I'm not a native english :-)