Just splitting hairs, and I’m sure its been decided, but this is for appointment only. It doesn’t say anything about apportionment.
They could throw darts at a list of names, but it doesn’t say that the electors can be apportioned by result of the general election.
Just thinking out loud on an issue I don’t really care to research.
If this idea actually goes anywhere (and it may not) as an initiative, I expect a court or courts to be involved somewhere down the line to rule on its validity.
It would be funny to see the Democrats argue against proportional representation, but I expect they would and not even bat an eye at their own hypocrisy.