Got it, I guess I needed a bit of a reality check with this one. If you don’t mind me asking, what factors make the prospect seem out of reach? Is my GPA in combination with my score the limiting issue? I did attend a top undergrad school (although I don’t know if this changes anything). Even if T10 schools are out of my league, I’ve still got a year that I want to make the most of, no matter what type of school these actions land me at. The other commenter mentioned that community service would be more impactful than a rewrite - apart from volunteering, what other moves are going to put me in the best position for next year?
Flawless stats, with even more flawless EC's added on and of course, being from the US is important. No matter how compelling your story is, T10 schools are just a big gamble despite the fact whether you're mission-fit for them or not, even as a US applicant.
As harsh as this may sound, I would just say T10 schools, even most T20 schools, are something completely unrealistic for any non-US undergraduate or graduate due to them having so many US citizen applicants that are more than qualified. In this case, your 514 MCAT is much, much below their average and median MCAT scores, and your GPA is around average for these T10 schools. You'll probably get screened out with your MCAT and Canadian status before they even reach an actual admissions to discuss your application. The only thing that may give you a foot-in-the-door at T10 "name-brand" schools are if you happened to publish a NY Times Bestseller science-fiction novel series, get published in
Nature, or was a former Navy Seal that happened to serve in Iraq and get multiple medals, but such a thing is quite far out there and rare, almost one in a million as they say.
If your goal is "somewhere is fine, I'll be happy with any MD school acceptance", then you'll be completely fine as long as you remain productive during your gap year. If your goal is "I want to go T10 or T20", then perhaps it is time to recognize that you're competing against 520+, 3.9+ sGPA students who exist in large numbers that are the literal and metaphoric definitions of "I work hard and sleep".