First win of the day suggestion
Right now the first win of the day bonus is pretty lackluster, you win a game every 18 hours and you get a small bonus to IP. I think there needs to be an additional quest of the day because right now you don't have to do anything special like carry your team through the game or improve upon your playstyle. I think it would be cool if we had something that gave a large IP bonus once a day which randomly selects from a pool of premade quests. Something like, "place 5 wards down in one game," or "have the least deaths of your team," or "upgrade your goddamn trinket," or "gain 200 CS in one game," could be beneficial to the community since it would provide a reward system for playing smart. You would get a sizable IP gain, like 500, and this promotes healthy playstyles.
First win of the day bonus would still exist so you could passively let the team carry you to victory if need be but once a day you would also have to actively try to improve your skillset. This would be a great for newbies who don't know a thing about the game and need some help gaining runes. I don't think it should provide a huge chunk of experience because right now people that hit level 30 don't know anything about the game still, so speeding the level gains won't help at all but at least they could have 2 full sets of rune pages and a few champions to start ranked with if we tune this correctly.