It almost makes me sick to think what my inbox is going to look like when this release goes live - people are not going to like it. I don't like it either. But I can either throttle the API calls, or I've been threatened that they'll remove all Enhanced Steam's users access to Steam, so I guess it's better than nothing and my hands are pretty much tied.
My enthusiasm for getting a job at Valve has gone down quite a bit since this whole thing started, honestly. I think that opening a dialog was nice, but rate-limiting your API and threatening to cut off user's access without giving me a chance to implement the changes you suggest... that just seems disingenuous.