I agree with @IUBOOS here; we’re facing a related situation (some variety of biology or another / premed / supposedly more flexible) but you basically have 3 years worth of premed requirements that are more or less cast in limestone, then senior year fall is where you send med school apps, and senior year spring to sit and wait. So all of a sudden this super-flexible major is no more, and you have to have a solid plan from day 1 to make it work. Study abroad? more likely dinner at Olive Garden if you need some major or concentration course offered once a year the time when you’re jet-setting across to the Galapagos. (we’re doing this planning as we speak…)
Having said this, I spent 14 years in college, earning two undergraduate and two graduate degrees, all in engineering. I’ve armchair-advised DD1 thru undergrad and grad architecture with no problems, yet trying to armchair-advise DD2 thru IU seems to be remarkably more complicated due to the vast number of courses and options available. So, let the pros do their work, talk to the advisor(s) early and often and stick to the plan.