It depends on the individual. Personally, I carry a 22 credit schedule so I can no longer put 6 hours in but my Econ curriculum does benefit me at some level. Ultimately, it just depends
Canada doesn't have any joint JD/MD programs, although it's definitely something I've considered. However, I'm greatly deterred by the fact that I'll be stuck in school until my mid-30s.
@todduncan2 keep me posted on what LSAC says. I did undergrad in the US and my masters is a taught degree from the UK with grades that are not easily equated to US GPAs...
I don't think your masters GPA factors into your LSAC GPA. I believe the LSAC GPA is specifically for your undergraduate work. However, law schools will look at your master's grades when they see your application.