Piezoelectric technology is probably the most common amplification method currently used for acoustic stringed instruments.
Some love it just because its sonic character, many hate it. Most musicians just live with it.
Of all the devices meant to improve the sound of piezo acoustic guitars, the one that most impressed me has been TC-Electronics' BodyRez both because of its simplicity and its effectiveness.
For those who don't know it, here's a simple demo.
BR has been implemented since then in several devices.
I am not sure whether there's just EQ and compression going; this is definitely possible, but they seem anyway optimised and tailored in order to make a guitar sound better, closer to mic'ing it.
It would be great if such a concept was available in the Kemper ecosystem. There are lots of acoustic guitarists that rely on the KPA for their performances, to not mention other kind of instrumentalists.