Some changes sound pretty useless like "Knuckles' introductory cutscene now plays in Angel Island rather than Sonic & Knuckles' first zone, and feeds directly into the level rather than fading out and restarting." I always thought the continuous intro was a trademark feature of that time; it's a witness to the arcades' influence on console games in the 90s.
Don't think about the probabilities. The smallest chance can take us a long way forward. It's not like we have anything else to lose.