If you're going to force your candidates through your TSA-like ATS (huh... they share the same letters... weird), you better be taking advantage of it as a shared point of contact (and data) for candidates and recruiters.

Think about all your metrics. How many are based on your company how your recruiting is "performing?" But how many are around what candidates think about you? Funnel metrics are about how people act, but do you know why they apply? What are your Candidate Performance Indicators?