Your point about new-account vs existing-account intelligence being fundamentally different is underappreciated. With new accounts, you're pattern-matching external signals to guess readiness. With existing accounts, you already have first-party behavioral data but most teams treat it the same way — dump it in the CRM and hope someone notices. The teams I've seen do this well separate the "discover" workflow (external signals + ICP fit) from the "act" workflow (internal signals + relationship context). Different cadence, different tools, different skills from the rep.