Bobouz, curious what strings you’re using, and (especially) if you also changed the bridge pins.
I've been using D'Addario Extra Light Phospher Bronze strings on most of my acoustic guitars for many years, and the JF-30 does just fine with them. I play fingerstyle with a combination of nails & flesh, and with a fairly light touch - but I still want a punchy & percussive tone. Maple bodies tend to deliver that combo quite well. On a few of my guitars, I'll bump up the string gauge per string as needed to enhance the overall balance from string to string, but on the JF-30, it's just a plain old EJ-15 set. One of my smaller bodied guitars delivers it's best tone with heavier gauged 80-20s, so it's always worth experimenting.
The bridge pins are stock. I've never thought pins make much of a difference. What does make a difference is having each string properly seated - I check each string while installing with a automotive inspection mirror to assure it's lodged properly against the bridgeplate.
Much more important to the overall tone is the saddle material, and assuring the saddle has a snug & proper fit. If there's any slop in it's installation, the transfer of energy will be impacted negatively - and shims are not the best idea for the same reason.