I agree. In theory, this option was already there, but in a big library it crashes as it seems to think it is trying to email the whole library and not just the selected records and PDFs. (edited) It now appears that you can email one citation and associated PDF, but not more than one. However – there is still an option to compress and email selected records, which should send a mini endnote library with (or without) attachments, but if you choose that, no option to mail the file appears.
further edit
okay – maybe an hour or more later – I got a warning that the email attachment (two records) was 26 Mb and too big to email for most programs. I don’t think it should be 26 Mb and trying to figure that out, but endnote is locked up, trying to open the attachment.