If you are at the 30 month national stage deadline you are obviously past the 18 month point where it was published for all to see. The content is available for anyone to read. Unless they do not know the name of an inventor or of the applicant they must be fairly naive about patents to have not looked it up on their own.
Sharing "PCT application as it stands" should be ok.
As you have already filed your specification with WIPO you have priority from date of first filing with patent office of your country or from filing date with WIPO for all 'National Phase' countries. So, first filing is not an issue.
Only thing, patent begets patents. If any idea strikes them to better ...