Having more options is always better, that's where PC gaming shines the most, and I'm glad you enjoyed your time with the game.
But watching your video of the final encounter, it definitely doesn't look fun, at least not your play style. Thats 4 minutes and a half of blocking (few parries here and there) and spamming attack and thrusts. No legitme parries, no counters, not much of a strategy at all. Completely destroys the progression and flow of the game's combat. Yes, I did die like 20 times at that encounter, but by the time I beat him, I was passing his stages in 20-30 seconds.
Definitely not an "easy mode" I'd be ok with. As back when the game released, I'd rather have a difficulty setting where regular enemies ain't so punishing, so it doesn't frustrate the player even more, but keep the bosses at 75%(give or take) damage output and speed. So it preserves the amazing mechanics and offensive styled combat, while still keeps the player a bit on their toes.