Or what if we scrapped the Senate altogether and replaced it with nothing so that our government would be more democratic and representative?
I've advocated for that too. This could be a half-way step.
Discussing abolishing the senate should be done anyway even if only for the sake of making your idea look more realistic and moderate. My ideal upper house would be stripped of most legislative power, and instead be relegated to war, treaties, and impeachment.
Or what if we scrapped the Senate altogether and replaced it with nothing so that our government would be more democratic and representative?
If the senate didn't exist, the "American" Health Care Act would be law right now.
Invalid argument, you literally have no way of knowing this. Your hypothetical does not exist in a vacuum and would inevitably alter the direction of American politics in unknowable ways.