It was a concessions to the
The truth is the EC is no benefit to small states, that is a myth. It is a massive benefit to swing states. No one campaigns in Texas, Oklahoma, Alabama, Road Island, etc during the general because all of their EC votes are locked up.
If the EC went away they would actually have to campaign to the entire country, not the 7 states that might actually swing. The idea that without the EC they'd only campaign to a handful of metros is not based on anything other than a Republican talking point.