The delayed trigger on Spectral Restitching appears to trigger on cleanup rather than EOT. This occurred in my current Omenpath Pick Two draft event. The delayed trigger is supposed to return the exiled creatures at the beginning of the next end step. However, when I cast it in my end step, the exiled creatures were returned immediately. They should have remained exiled until my opponent's next end step. I think it's timed as an "until EOT" effect (duration-driven) instead of "triggers at EOT" (event-driven).