And that's excellent feedback, thank you! I must say, I agree. I think the integration guide is just mentioned as reference for the "renew after 60 days" advice. Maybe it would be better to put the link as reference in a footnote or something and don't emphasise about the whole large provider integration stuff.
I believe some time ago the e-mails were send per certificate, but that would mean sometimes users get multiple e-mails at once. So LE decided to integrate this into a single e-mail. I also believe users have already suggested to include more details about the to-be expired certificate by using e.g. serial numbers. But this hasn't been implemented (yet?) or was decided against, I don't know exactly.
I also think it would be better to change the order of the provided information. The link with the explanation about why one could get an e-mail despite having renewed (with different hostnames) should, IMO, be put above the link to the community.
@lestaff Any thoughts about the above feedback from @cadet ?