Is it possible to split the Programs (not only App Data) and Documents as separate backup options. Sometimes one just want to backup your Apps only. It will save a lot of time if your Documents takes up most of the drive's space, it may consist mainly of Music which does not change often.
Not at present. Though, the programs' data is the critical bit. Since, in the event of a failure, you can easily just reinstall the apps.
Sometimes, the impossible can become possible, if you're awesome!