In this case we're in control of the server and the client, so it's less of an issue, but in general it's not the ability to change URLs that I'm getting at her

In this case we're in control of the server and the client, so it's less of an issue, but in general it's not the ability to change URLs that I'm getting at here, and that's not a flexibility we've needed. It's the ability to add extra functionality by adding links on each resource without breaking existing clients that I'm missing at the moment.