I agree ZFL and ZGT have no acoustic simulation, they are more taylored to plug a real acoustic guitar.
I tested both now with acoustic guitars.
Both are similar but ZGT for has a litte more character (for my taste)
Generel I install an EQ in every acoustiv RIG. Because the influence of different acoustic guitars is bigger than e-guitars.
Used Guitars:
Lowden S10 (Jumbo style) with passive piezo.
Lowden F27 with a L.R.Baggs active pickup
Yamaha APX500 with avtive piezo.
S10 with passive Piezo needed of course a lot a amplifying, but the Kemper can do this.
The profiles shows the personalities of the guitars very clearly and after some tweakin both are sounding very good with enough dynamic..
As it is with every equipment for acoustic guitars - it changes not a bad guitar to a good guitar but a good equipment let a good guitar be a good guitar .
Your profiles in connection with the Kemper let the Guitar live. This is the best you can expect.
For me the best is a Mic - but not in a Rock-Band