Ever since version 10 was introduced there has been a serious gap in the functionality of managing tag hierarchies compared to version 6. Whilst you can create a hierarchy this can only be done one tag at a time. Multiple tags cannot be selected either. The same shortcoming exists in the web version.
The only workaround appears to be is to revert to Evernote Legacy,
When is this going to be fixed? If it is not, or cannot be done with the current architecture/software, can you tell us so users can decide whether o look elsewhere.
Many thanks.