if the federal government wasn't so large but rather a looser organization such as the EU, then each state would be a sovereign entity and the presidency wouldn't matter so much. then you would have 50 or more choices (50x2=100)
It just feels better to live here for many reasons (safety, culture, nature, walkability, quality of restaurants and clubs and overall you don’t see many poor people around). Europe has economic issues but the quality of life is very high most of the time.
The conclusion of that experiment was that half of the country would gladly go to war to force the other half to stay as one country. I don't think that has changed. Especially given that the primary political divisions aren't between state lines; They are rural and urban divisions.