Women on paper money and coins: two heads are better than one

The new quarters using women on the reverse side have their depictions rather small. Here is a thought tomake the reverse of the quarter look like the obverse and making the woman's depiction bigger. I realize itwill end up being a two headed coin-but I can live with that.

And in this same vein, why can't we use Harriet Tubman (and others) on the back of the paper money? Here isan example making the back look like the front of the Twenty while still using Jackson on the front. In thisseries, the twenty is purple. The federal reserve eagle isn't needed, so I removed it. The bill says 'FederalReserve Note' and it has the district letter and number. However, I did use the eagle on the back.

References:
Quarter Coin coloring page(https://www.supercoloring.com/coloring-pages/quarter-coin)
CFA Recommendations for 2014 First Spouse Gold Coin Designs(https://news.coinupdate.com/cfa-recommendations-first-spouse-gold-coin-designs-3085/)
Souvenir Cards(https://www.christmasseals.net/index.php/souv)
Coverage: What will the Fed do this week?(https://talkingbiznews.com/media-moves-and-news/coverage-what-will-the-fed-do-this-week/)
See a Design of the Harriet Tubman $20 Bill That Mnuchin Delayed(https://www.nytimes.com/2019/06/14/us/politics/harriet-tubman-bill.html)