I disagree that the LF didn't play a large role in the PT. In fact, I'd say the lack of focus on it was the entire crux of it. It's laid out at the very beginning of TPM when Obi-Wan says, "But Master Yoda says I should be mindful of the future", and Qui-Gon replies, "But not at the expense of the moment. Be mindful of the Living Force, young Padawan." That exchange is crucial to understanding the entire PT, IMO. When the future becomes clouded by the Dark Side, Yoda is unable to see the threat that's right under his nose which leads to the downfall of the Jedi and the Republic, and Anakin focusing on the future is what leads to his. Beyond that, there's really no indication that the LF has anything to do at all with ghosting, although I do think it probably plays a large part in it.