I tried the soft tip for about 2 months. Too "sticky" for me. Kept throwing (when using right/left english) my shots off. Just too difficult to dial in just the right amount of throw needed.
So I put a Triangle (hard) tip on and am shooting finally lights out again. (On a Joss/Revo 12.9 btw.)
Think of a soft tip compared to a harder tip as being similar to using a computer mouse. A sensitive mouse setting (the sticky, soft tip) requires a more precise hand movement (the pool stroke) to accurately click (strike consistently) on the desired location. Many under 650 or so fargo folks just don't have a smooth or precise enough stroke to consistently "throw" object balls into the pockets, or, to make the perfectly straight shots.
I find that a harder tip is much more forgiving of my minor stroking flaws because it seems to lower/normalize the amount of accidental throw (spin) imparted on the cue ball. It also seems to make ALL my english shots more consistent.
Could be smoke and mirrors, but harder tip is better for me.
And, package that with a forgiving low-deflection shaft like the Revo, and voila, easy-peasy mode!
Just my observations anyways, results may vary