While I fully agree that there needs to be a better system in place for tracking support, there is a way to get a general idea of what you have out. If you bring up the overview page and go to 'units'. Then filter out everything but 'outward', you will get all the troops that are in other villages. Then you can sort by your defensive types to bring them all to the top. From there, you can click the (i)nfo button on the right and see where they are and bring them home if necessary.
I've actually grown accustomed to this and it doesn't bother me too much. The worst thing is if you are trying to bring everyone home, you need to go through the above steps over and over again. As soon as you recall support, there is no way to get back to your overview screen. And since the overview doesn't save state, you need to switch tabs, filter, and sort all over again.
