I'm totally onboard with tiers. As I see it there could be 3 we operate with.
Level 1 - Noobs
Level 6 - Still Affordable and many abilities kick in
Max - High Rollers
In fact, we could test out the Level 1 in this current season by limiting the games to level 1 for all summoners. Hence, getting everyone playing everyone again and not leaving a sour taste of 'pay to win' in the minds of many.
Regardless Level 1 is a must and will accommodate the lowest level of players wanting to give this a try.
Let's get this back to a game of skill rather than how much you're willing to spend.
We need to grow the user base first, and over time more will level up. But it will take time.
So let's have some fun along the way.