Influence of Double Major on MBA Admissions

Wanted to mention that this is my virgin WSO post, and that I'm hugely grateful to have found this community. I appreciate whatever feedback you guys can offer!

I'm a CU Boulder math/phys double major enrolling in classes for next semester and considering whether or not I should drop my physics major to solely pursue math. Longer term, I want to get an MBA from an elite university through a deferred enrollment or 2+2 program (thus the H/S/Y in the title).

My two options are essentially this: I can stick it out with the double major, graduate in 4 years, have a damn full course load every semester from here on out, and not be able to study abroad or really take any higher level non-major courses, or I could drop the physics major, just do pure math, graduate in 3.5 years where my last semester is spent abroad and my overall course load is much lighter (read: diverse and interesting), use the lightened course load to involve myself with even more genuinely meaningful ECs, and take the semester I have after graduating to refine my apps to HBS 2+2, Stanford GSB, and Yale Silver Scholars. My tone may make it seem pretty clear that the second option is more materially desirable, but I don't want it to come at the cost of not being admitted to one of those three programs due to a perceived lack of effort, intelligence, or what have you for not double majoring (esp. given Boulder's rep for physics).

If you made it here, I appreciate your time and would love to hear any advice you may have!
Thanks!