As Beavershark said "At the end of they day you will be able to do what works for you to get the job done, and that is the same no matter where you go"
The 8-5 day is typically broken up into 4 hours of lecture an hour for lunch and 4 hours of either preceptorship, clinical skills, anatomy lab, colleges, or independent study. We don't sit in lecture all day which is nice, but most of the time you are learning the entire day. There are some "busy work" things, mostly confined to Wednesday afternoons during college events, but sometimes they are high-yield (IV placement, Chest tube placement, suture labs).
The benefit to the new curriculum is that I am being exposed to patients as part of the care team right away and I am learning diagnostic reasoning from the get go. 18 months vs 24 months for first 2 years and more clinical experience.
If you go to medical school you will see your personal time shrink regardless of the program you choose. Someone said something that seems true to me, you only have enough time to be a medical student and to keep one hobby/thing that you really enjoy. Some of my classmates enjoy the outdoors, others go out dancing, some do yoga. My family is my +1 activity. The nice thing about the curriculum is that our exams are on Fridays so you bust ass all week and have the weekend to relax. I typically do nothing school related Friday or Saturday, and look just through stuff on Sunday.
Med school is hard. Be prepared to kiss a lot of things goodbye in order to be successful, but don't forget to hang on to the things that will keep you sane.
Best of luck!