Since they made the loading screen interactive allowing you to see the tooltip of everyone's keystone and summoners surely the next logical step is to show the champs QWER abilities.
So you can hover over them and read the tooltip of what the abilities do. It could just be the line of text they use in the collections tab (or paragraph in the case of Ryze's Q) to describe the ability.
This would benefit not just newer players but everyone when a new champion is released and you can refresh your memory with what they do as you're loading in to fight, or work alongside them.
External link →