Shorter Version: I’ve had lots of FRN Spyderco knives and loved them all, and never felt they were lacking. FRN is really durable and comfortable, in my opinion.
Longer Version: Almost all my Spyderco knives have been an FRN format over the years: cricket, dragonfly, delica 3, ladybug, manbug, Native 2, calypso jr. I list them all just so you can see 1) I’ve had a lot of FRN over 15 years and 2) a lot of them are older / discontinued — meaning with CQI, newer FRN models should clearly be more refined and even better.
I’ve always loved FRN and I’ve never missed liners or g10. The only reason my current rotation (Techno, Brouwer, Caly 3, g10 UKPK) aren’t FRN is because they’re not available in FRN. I’m super excited for the FRN para 3, and will buy it as soon it’s available. And would gladly buy all the ones I have now in FRN if they make ‘em!
My use is pretty edc/general utility: boxes, packing tape, mail pieces, foods, occasionally whittling nubs and poky bits off of sticks.
EDIT: The UKPK is available in FRN, but I like the spring action better and have a fondness for my original black g10 UKPK.