This is just an idea. It can and should be adjusted as we go. I'm all for it! The main thing is that the balance is as realistically as possible, finding a golden mean while taking into account everyone's interests. As an option, instead of adding a multiplier, we can add a summand. That is, add a single bonus equal for everyone to the rating (instead of multiplying), but the bonus will depend on the tournament rank. And for the winner, the significance of the bonus in the total sum of his points will be significantly less than for the underdog – which is also correct. The winner had practically no competition compared to the others... And I think this will be more correct, so let's keep it in mind...
Все люди - братья, но в каждом из нас спит волк.