1 Click install wordpress core files
A must have feature would be to have a button to 1 click install wordpress core files.
Lets say you got a wordpress site with wordpress 4.9.
This wordpress got hacked, you got tons of files infected in wordpress core.
In one click wp toolkit can replace all website's cores files with fresh ones.
That would help handling with hacked websites in a matter of minutes, instead of doing it manually.
Stas shared this idea
Ability to verify WP core file checksums and reinstall WP core files was added in WordPress Toolkit v5.6.
I saw it on other hosting companies and it makes life easier.