You are absolutely right about the 1 game in neutral field Final for Libertadores and Sudamericana, that was a dumb idea that they tried to copy from UEFA and it has not worked at all. But I'm pretty sure that wouldn't work for Copa América, main reason being that the travel and scheduling would make it almost impossible for it to work for a 2 week tournament and the home field format is what makes the WCQ so important here. We'll see if the aura continues now that it's easier to qualify than to be out of the WC, but for 30 years that shyt felt waaay more important than any Copa America (even though it had 4-5 "winners" instead of 1 champion).
I'm still shocked that they can't figure out how to properly market Libertadores or Sudamericana effectively in the States. Bein Sports coverage is barebones and lacking. At least when there were Mexican teams in it, all the Spanish language media used to provide decent coverage on it but that is years ago now.