Yes. The improvements aren't theoretical. They're tested.
Ranked choice voting. Voters rank candidates instead of picking one. If nobody gets a majority, the last-place candidate is eliminated and their voters' second choices are redistributed. This kills the spoiler problem — you can vote for who you actually want without "wasting" your vote. Alaska and Maine already use it for federal elections. New York City uses it for primaries. The evidence: voter satisfaction is higher, negative campaigning decreases (because candidates want to be your second choice too), and third-party candidates can compete without being blamed for splitting the vote.
Independent redistricting. Take the drawing of district maps away from the legislators who benefit from gerrymandering. Arizona did this via ballot initiative in 2000. Michigan in 2018. California has had an independent commission since 2008. The result: more competitive elections, which means legislators have to actually care what voters think because they might lose.
Public campaign financing. Get private money out of elections. New York City's matching funds program multiplies small donations — a $10 donation becomes $90. This means candidates can run on small-dollar support instead of spending half their time calling rich donors. The result: more diverse candidates, more competitive races, and representatives who owe their constituents, not their funders.
Automatic voter registration. 21 states plus DC already have it. When you get a driver's license or interact with a government agency, you're registered unless you opt out. Turnout increases. The burden of registration shifts from the citizen to the system, which is where it should be.
Election Day as a federal holiday. Or expand early voting and vote-by-mail nationally. The fact that the US holds elections on a Tuesday and expects hourly workers to find time to vote is a structural barrier that disproportionately affects the people most impacted by policy.
The honest caveat: I said all of this in my theory-of-change answer and someone rightly pointed out that these reforms require the people who benefit from the current system to dismantle it. Ranked choice voting and independent redistricting have been achieved through ballot initiatives that bypass legislatures — 26 states allow that. Federal reforms like public campaign financing require Congress, and I don't have a clean mechanism for making that happen. The theory of change is partially proven, partially aspirational, and I said so then and I'll say so again now. Plank II.