"Hey, remember when we said we didn't need any of that data, and it was totally okay to design the app without any expectation of needing it, and that it would actually put us behind to add even hooks 'just in case' like you begged? Well, turns out we need it. And we need it right now."
...
"Oh, and this is totally not our fault because you should have just gone ahead and done the thing we told you not to do anyway, on your own time."