After almost 30 years of normal shafts I converted to LD shaft during the pandemic. Same as you - Predator 314-3. I was going to make some sort of documentary, but I got lazy. But, the short answer is it takes a diligent regimen of practice to convert to the LD shaft. I practiced 2 hours daily for a week just on conversion. No games. Just drills trying to reprogram my mind/arm. The second week, I did 1 hour of drills and 1 hour of play. The next week 30 minutes of drills. By the second month I was just doing drills every other day. Overall, it was about 100 hours of dedicated practice to converting to get to about 95% of where I was before switching. The last 15% came over the next few months.
You read that right. I did get a boost by switching. Maybe 10%. Maybe a little more. That primarily amounts to 2 things.
1) a larger sweet spot where mishitting the cue ball slightly does not impact the shot.
2) inside english is used as much (perhaps more) than outside. I can consistently shoot longer shots with inside english that I w/could not shoot before.
I could shoot just fine before I switched, but I am pleased with my decision to convert [650+].
Lastly: about a decade ago, I got a LD shaft and tried it and swore I couldn't convert. But that was just a lazy and undisciplined "attempt." Anything worth doing should be done right.