Sounds like the OP is referring to the feel of the shifter quality through the shifter itself and nothing to do with the actual slipper clutch function (And I am pretty certain F4i's never came with slippers to begin with...). I know what he's talking about, the transmission in my old Honda Super Hawk 996 was the same way. I agree, they do just "feel nicer", with no tangible explanation of why it feels better. I found getting the pro star shift kit helps a bunch with the smoothness of the transmission and engagement of the next gear when upshifting/downshifting.
Mr Turkish Delight for my Feet is correct. About what? What he said, damn it.
1) Yes, Honda did not offer a slipper clutch on the middle-weight RR.
2) Having owned a number of Honda bikes, I can state once on the go they shift like 'butta.' Though the shift from Neutral to 1st was always a clunky sounding bit of drama. It always shifted assuredly from 1st to 2nd and so forth.
3) One ride of 2-hr is a blink of time, sir. You NEED saddle time, lad. You and your bike will be happier.
4) like the other lads pointed out, spend some time with your bike's mechanicals. Use quality oil change it sooner rather than later. Fresh-ish oil is cheep insurance. Don't rely on another to adjust your bike for you. Set your clutch up for YOU, not some general, generic, mythical rider.
5) Motorbikes are not for everyone. By not being enclosed, they require a more hands on relationship than autos. Many - most car drivers never develop a more... "animate" relationship with their 'steeds.' Long-term bikers do acquire, or even aspire to a close relationship with these crazy inanimate objects.
6) Do yourself a great service and check out this page and download the proper service manual. It might save you & your bike's relationship: https://www.zx6r.com/service-manuals...#/topics/68548
Cheers & good luck.