+1 on the preamp buffer!! Makes all the difference in the world, and should have been included in the design of the instrument.
You absolutely want to consider the Cafe Walter PZP-1 pickup buffer. I had the same complaint about the piezo in my A/E. The buffer adds an incredible amount of warmth and woodiness to the tone. The best $49 you’ll ever spend on your A/E.
-ST, New England