This is the exact path I'm taking with my company very soon (I refer to it as persona based pricing, not sure if that's the correct technical term or not).

We've found that increased usage is not what differentiates our users (no one hits the imposed limits on their plans). So we're switching to plans that users should be able to read and immediately identify themselves with (Solo, Consultant, Agency)

Would love to chat with you about your thoughts and results if you're interested.