@girish Why not have them use LAMP, which is what this was made for? Leave the current Wordpress as is, and not make another one. No one is stopping them from using common sense and installing Wordpress in the COMPLETELY OPEN LAMP Stack app..
Though adding SFTP to all apps would be nice. I am in the process of building a Plex app that would completely benefit from this for users.
EDIT: Also, the ability to add custom environment variables in CloudronManifest.json AND the Web UI would be very nice for custom apps.