Our Standard Upload on the web interface has been upgraded and allows you to Upload multiple files at once. When uploading existing files you can decide if they should be uploaded again or not. Alternatively, you can choose to override any existing files. The other upload options have become obsolete because of that. Most browsers do not support java upload for some time now. The Flash-upload can also be removed thanks to this upgrade.
Update 07/25/2018: When uploading files via web browser, the change date of the local file is also transferred to MyDrive.