Emails are still the issue in pipedrive. 

When you automatically sync your gmail, it happens, that they are sometimes assigned to the wrong person/organisation/deal - especially if you send emails with the same subject and add someone from your company as cc - pipedrive this consider as the same thread.

It would be nice to have the same option as with tasks - just relink the email manually from deal/organisaton/person detail page - using similar system as in task