How will Riot manage the learning curve for new players?

With each new patch, it's like we have a new game entirely. New champions, runes, items, in addition to the hundreds that are already in the game.

League has been deliberately put in a state of "change for the sake of change." I have played for 7+ years and can tell you that the changes we see every patch were not designed to make the game reach a "final perfect state." The changes are meant to keep the players involved in the game.

I got in at a time where playing 1-2 hours a day was enough to grasp the entire game at a Gold-ish level in 6 months. Now we have x1.5 the champions and many more items and mechanics. Newer champion abilities have become too complex to understand without reading the champion's wiki.

From a game development perspective, how does Riot aim to make the learning curve manageable for new players?