Stop changing things would be my first tip. Pick one camera and stick with it. Second tip is to find what works for you at the plate when batting. These guys that post these tips are generally top players that get to most balls, regardless of where they start their pci. Thirdly, I would suggest a patient approach, don't swing for the fences on every ball, look for the pitches that catch too much of the plate.
Lastly, and this something I noticed in my own play the other day, keep your hands relaxed. I found that I was gripping too tightly and when I went to hit the button, I was jerking the controller, therefore, I was ending up with bad pci placement. Without thinking I was pushing forward when I did, making my pci drop.
I'm not a great player, so you can take all of that with a grain of salt, if you wish.