Managing and protecting those "other desktops"

Any improvements coming in non-LOB package detection rules, beyond the current app bundle version check? This is needed to cover situations for packages that install in non-standard locations or don't have an app bundle. Currently these types of packages install over and over every check-in, since it can't determine if a package is already installed. It would be awesome to offer more detections, such as checking package receipts/version, a particular file path, or a user generated install check script to determine if a package is already installed.