no thanks
no matter how you cut it, mirrorless cameras are a poor platform. By platform, I mean how you hold it and everything that mounts to it. Sure, with a pancake lens it's nice, but put anything bigger and it starts to have issues on how you hold it. Mounting a EF or EF-S lens is a joke. Start to add a tele and a flash and see how you like to hold it. People complain about holding a XXXD body, how do you think this will be?
Honestly, there's no mirrorless system including Leica that I would buy into. No pentaprism viewfinder, poor ergonomics, composition issues, no longer "pocketable", and a host of inherent problems with the platform itself. By the time you add all the good stuff, you have a small DSLR, and still have inherent problems.