Rotation is division, not subtraction
Six people sharing 3 a.m. still means somebody is awake at 3 a.m. The incident count did not change. The headcount did.
The answer
More people on the rotation: do the math
It spreads the pain, which is real relief. It does not remove the pain — and now you are paying more people to absorb the same broken nights.
You hired for the symptom
Every new on-call engineer exists because the system needs babysitting. That cost renews every month, and it grows with the system.
What GIIP FDE Ops does instead
Detection, triage, and remediation run continuously under enterprise governance, with the escalation path you define. The rotation stops being how you buy reliability, and your headcount goes back to building the product.