I’m wondering how to get a smoother manual shift than I get with my shift assist! I’m pretty good at it, but it’s like having a seamless automatic transmission with a paddle shifter! Both up and down! Accelerating in a curve and shifting w/o bobbling a bit! Using engine braking/rpm matching flawlessly on a freeway exit. I’m doubtful at best anyone can shift faster and smoother than my shift assist! But you knew that, right? ???
Try this on yours. Use a fast-slight squeeze on the clutch to no more than 1/3rd of the way - pop it into gear - and a quick release. Reverse process on downshifts. I find 90% of the time I can barely notice the shifts . I think what I was doing originally on the GTL for manual shifting when I first got it was pulling the clutch in a bit too much (anything over half way, if you are not coming to a stop, is too much on mine), and then I let it out a smidge faster that was necessary, so I got a little "bump", even if the revs sounded matched. Play with it.