Thanks to a bunch of hard work by Thorsten and others, the open source CLI scripts we have for exporting and importing WordPress sites are getting better and better.
When exporting, the script gives you a summary of what will be included in your export file.
For importing, it would be nice if the script pre-flighted your data and told you how many total posts were to be imported, whether new tags were going to be created, identified the custom post types in your export file that were to be rejected by the site, etc.
Also, we should figure out a better way to make sure all of our internal scripts are regularly open sourced (and synced to most recent versions).