All I can do is wish you good luck. I agree with the 301 redirect idea. You may at least get some traffic from old deleted pages if you can.
Google's indexing is a complete wack job at the moment. It's been that way for at least two months. I'm still seeing pages in their index that I deleted months ago. I have no idea how to completely remove them from google's index and serps. Some of them are supplemental, some are not. Some pages dissapear from their index, then reappear on different datacenters. So who knows?
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