Any time you reduce the shift throw, the effort to shift will become proportionally harder. This is true of any short shifter. If the design is such that there is a lot of friction, it will make things harder.Do these make shifting into gears easier or harder?
I had the TWM Stage 2 short shifter and I didn't like how it made shifting into gears a lot harder.
Our bushings make shifting slightly easier because the spherical bearing removes the compliance in the OEM rubber bushings that you would normally have to work against. However, it's likely that they will not reduce shift effort so much as to fully compensate by the extra effort your short shifter is requiring.