Hard to answer the impact on your systems had we not stopped it... we don't know the full capability of your systems. Whether you can take a 10k packets per second ACK flood or a 1M pps ACK flood, or the 100M pps ACK flood depends on a lot of things we aren't privy to.
What we can tell you is the frequency, size and nature of attacks that Cloudflare sees, and when we can clearly identify that an attack was unambiguously targetting you specifically then we can tell only you about that too.
If there were a global dashboard which was vague about the target and source, merely the frequency, size and nature... would that be valuable?
