You're way overthinking it. The JP trem wasn't some amazing breakthrough. Don't get me wrong, I love the bridge. I have a few JP7s. But there's absolutely nothing special about the bridge. They could swap it out tomorrow for a Contour or a Wilkinson or a Fender Deluxe unit and the guitar will still perform the same. The bridge is merely the plate that holds the strings. The spring tension and configuration determines the feel, the routing on the body and geometry of the neck joint determine the range of movement, and the nut and string play determines tuning stability. Also, I don't think you're remembering the trem Renaissance that was the 80's and 90's. Yeah, Floyd ruled the roost, but because they were patented and locked in with manufacturers all kinds of cool bridges came about. Kahler, Washburn, Ibanez, ESP, Schaller and many more were constantly tweaking both locking and non-locking trems trying to make the Floyd killer. If anything this is the most stagnant time in trem history.