I'm not really sure that that is all supposed to mean? Why tiny body? Smaller than the current Canon bricks. I hope. But it doesn't mean "tiny". And I currently shoot L glass on my a7 rIII - no balance issues, no battery issues ( did a 900 frame time lapse last week and had a 1/4 batter left ) .... and yes, it has EVF that gives me realtime feedback on exposure.
So yes, I would love to have a Canon that does what the Sony does where I don't have to use Metabones adapted lenses. I have a 6,000 canon that is a paper weight now ( a heavy one at that ).... using a 3,000 Sony that is more useful in every aspect. I have 25 years worth of L glass I don't want to give up.... so absolutely.... I would sell my Canon paper weight if they gave me a decent option.