I can't help to think how much better the game would be without Runes.

• +12 AD or +20 AP at level 1;
• +18 AD or +30 AP for getting kills (Eyeball Collection);
• 18% AS for getting kills (Legend);
• +20/40 Free scalling AD/AP (Gathering Storm/Absolute Focus);
• Count the amount of runes that give flat or flat+scalling damage;
• Have you noticed that most of runes deals or increases damage?
• 20% damage conversion that's easily proc'able on many champions;
• List goes on...

Can you imagine how the time to kill would be if there was no runes? If Ignite's damage were nerfed?

Can you imagine a game where you actually have chance to react to a engage?