A " file manager " on the lines of Cpanel
A file manager like Cpanel is all that i felt missing on your services and I tried the SFTP but its so clumsy compared to the file manager . The web is expanding and a lot of non techies are coming on board . All os us need our life to be as less technical as possible . Not just for us , but for your own rise in business , please consider adding a file manager .
Also, need Folder Access Control for users working in different areas of application. For example, people working on loading products needs access only to media/import folder in Magento