I've noticed the exact same thing with my own game, sausage. (By the way, I'm feeling slightly uncomfortable calling you 'sausage'; does that word mean the same thing in American slang as it does in British slang?)
Anyway, the problem I've always had with such miraculous discoveries is that the magic only ever lasts a week, sometimes if I'm lucky two or three. I've lost count of the number of times I've believed myself to have finally discovered the secret to playing my own best game.
The improvements that stay long term, end up being the obvious ones, the ones you read about time and time and time again. Simple repeatable mechanics, better knowledge, correct mental approach.
It feels to me that when my game is at its best it's like a great big barrel of fine whiskey. Unfortunately that barrel is normally riddled with holes. My pool life is a constant battle to plug those holes up, but as soon as I do that, other holes open up elsewhere.
Perhaps you just plugged up a hole, sausage. Oh, and the other thing is, I think sometimes when you make small sudden 'magical' changes to your game, you've actually plugged up a completely different hole from the one you thought you plugged.
But I don't want to get down on your changes, sausage. They may work for you forever. And I very truly and sincerely hope they do. No one likes spilling good liquor.