Hi! I am a dental hygienist applying to the DDS program...and I live in Minnesota so I know all about the midlevel practitionar programs here 🙂
The question you need to ask yourself is- WHAT DO YOU WANT TO DO? A master's degree in dental hygiene is completely different from a master's level education as a dental therapist. If you get a MSDH, this is more structured towards teaching or working in education/research. A dental therapist (ADHP as you call it) treats patient's in areas that are designated as underserved, which is typically rural, and works remotely with a dentist treating patients with limitations to their treatment, like some extractions, performing pulpotomies, and fillings to name a few procedures. There are currently two schools here where you can get a degree as a dental therapist, namely, the University of Minnesota and Metropolitan State University.
The future of dental therapists in other states is uncertain at this point, as far as I know. I would say, choose what you want to do, and commit whole heartedly! Good luck.