woahhh, you need to calm down hahaha. every US MD school essentially leads you to the same place. a med student from NYU Med doesn't have much of an advantage over someone from Drexel Med. your education is what you make of it. it's not like law school where the school's rank matters.
also, match lists are not indicative of anything. it's poor judgement to use schools' match lists to choose one school over another. each match listed is based on that individual's work, test scores, etc. the school is not the one who got that person the match. the individual student got the match. you can get into the top residencies from any US MD school.
I have a few friends in the UMKC 6-year program. I haven't heard anything bad about it. My friend told me it's stupid to apply there for the regular MD program since, like everyone said, they simply place you after Year II. There's no advantage going to UMKC whatsoever if you do that. Clearly, all you did was waste 2 more years in undergrad since they did you no good by not placing farther along into the UMKC curriculum than Year II.
I personally think the 6-year over 8-year program is a scam anyway because the only reason you finish 2 years earlier is because you barely get any breaks. You get 3 2-week breaks or something per year and that's it. I'd much rather spend 2 more years in undergrad. It's a lot of fun.
I also think undergrad provides invaluable growth in maturity and experiences that you definitely miss out on by doing a 6-year program. Just to name an easy example: studying abroad. There's no way you could ever study abroad if you're in a 6-year program.
You're going to become a good doctor from the UMKC program, though. It doesn't matter what US MD school you go to.