I'd be curious to see a
I'd be curious to see a comparison showing the data of how the handling and braking of these EVs differ for dry roads versus wet, snowy or icy roads. And then compare that to lighter, ICE vehicles. To me, the data for the worst conditions is more important than the data for the best conditions. I'm not as concerned which vehicle is faster in a drag race on dry roads.
If heavier vehicles performed better in the worse conditions, then I'd say that lightness is overblown. Though, it is generally more expensive (for the suspension, tires and brakes) to make a heavier vehicle perform like a lighter one. This extra cost must be offset by the energy savings of the powertrain over a certain amount of time, however long that may be.