Preset keywords like "jungle" or "mid" and so on for champion select to find champions easier.
Add a feature into league in which you can make a keyword and then link a bunch of champions to that keyword. Much like how champions come under a title like "Assassin", "Fighter" or "Tank". When in champion select you can type in the keyword and it will display the champions you linked to that keyword. For example, you have a pool of 5 champions for jungle. So you make a keyword like "Jungle" and link those 5 champions to it. So when you are in champion select you can type "jungle" and the 5 champions are displayed. And the same of other lanes.