Don't really understand what you're saying about high speed filming... the 435 isn't much bigger than an alexa or an epic depending on the build.
Of course waveforms/histograms are not analogous to a light meter. That's my point - it is a completely different way of working.
And as you are glad that you know what you captured the moment you left the set, I appreciate being able to actually look through a lens, not a delayed video output. Finally the Alexa Studio is bringing this generation of cameras up to speed!