Picked one up to see what ML is about, and I find using ML on the EOS M incredibly underwhelming (thus far). Perhaps I'm doing something wrong, but shooting 2.5k and up RAW without a proper non-lagging full liveview doesn't appeal to me at all.
If it's deliberately implemented, it won't get a recall. Instead, they'll throw a bone (e.g. extra record time), and allocate more resources for marketing.
Are these temperatures from the image sensor? If so, opening up the device and measuring the CPU temp. yourself would probably be the quickest way to conclude the testing. This might help you or others with putting up a legal case against Canon.
It's a $4000 product for crying out loud. Problems like these get addressed during the initial stages of electrical design, and if they don't testing does.