There are 3 different methods to open an object - 1.) click on the icon - file is opened read-only, 2.) click on the link - file is opened in read-write mode, 3.) click on download button - file is downloaded with no Connections menu items in Word/Excel and no automatic upload capabilities.
There should be an option to configure users only to enable the read-write mode with all Connections menu items to handle an object within Connections. Only power users should get the other option - like download (and break connectivitiy to the Connections tore) or read-only/display only an object because for many users all 3 different options to open an file is too confusing.