As for music terms and simplicity, I agree these modes can make things more complicated especially when you think about the theory of today. Remember these "hypo" modes are from the late nineteenth century, and they were dropped in the mid-late sixteenth century. By Music theory’s stand point music will what to end on I or tonic (except jazz/modal compositions). When these modes were apart of theory IV was just as acceptable of an ending as I. This why these modes are referred to as “plagal”. If you wish to theorize from the last 200 years, ignore them. You may want to ignore them all together, like I said they're only for those who want the knowledge.
"My whole life is a dark room...ONE BIG DARK ROOM" - a.f.i.