You know what would make the game more engaging? Daily quests.
And before anyone points this out, yes this is a direct reference to Heroes of the Storm, but you know what? It works. Every day that I'm not too busy I'll play a couple of games of HotS for the nice bonus gold, I really wish I had an incentive to play a few games of League every day. Usually I just sit around dreading the concept of Solo queue too much to jump in, and it isn't until some new content suddenly comes out or all of my friends are online that I get back into League.
Besides, we've been needing IP gain buffs for a while.