no tom the eos.m series is rather good if coupled with the right lenses and expectations ,basically they are a foot in the water camera and suit certain applications extremely well ,but not up to the speed and clarity of a dslr while composing the shots .i.e I just tried a m5 and found the viewfinder lacking but I,m quiet happy with my m3 for still and/or slow moving stuff ,the STM ef-s lenses perform really well with the m series bodies .
but they have there limitations so theres no way I'm dumping my big gear yet ,I think as do others though that 5 years down the line big changes will have happened .time will tell