I'd recommend using Powershell to run the copy database command. This puts the work internally at Microsoft which should be a lot faster than exporting a BACPAC and then reimporting it. However you'll still need to clean the data prior to releasing it to non-production environments otherwise you're likely to be in violation of the GDPR and other stuff.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning