Strange than that you and I have different opinions.
If s State sets requirements on electors I see that as within their powers.
There appears to be no reason that an elector cannot vote for whomever he wishes.
The legislature can only appoint electors they do not become part of the legislature after appointment are and were intended to be complete Free Agents.
Madison dreaded legislative control of the electors as the excerpt you posted shows.
The “requirements” were not political but primarily property qualifications to hold office.