If each change takes the form of either cutting or adding a card instead of replacing a card, and you simply play a lot and cut or add cards as they seem necessary, you could potentially naturally evolve toward an optimal deck size of some number greater than 60
1 2 "Cancelled D&D Beyond Subscriptions Forced Hasbro's Hand"
2 (booster set) July 18, 2025 Fullmetal Alchemist (starter deck) July 25, 2025 Fullmetal Alchemist (booster set) August 29, 2025 Attack on Titan (booster set and starter deck) August 29, 2025 CODE GEASS Lelouch of the Rebellion Vol
Just a little taste of things to come
GX episode 50: "Magna Chum Laude" Yu-Gi-Oh
While they were still bound by the 1-per deck rule, they no longer featured multiple energy-type attacks (with the exception of Latias, Latios and Rayquaza from EX Deoxys) and often had very beneficial attacks, making them much more playable