I'm afraid that the answer is in the piezo's themselves. You will have to adjust the string volumes of the models to your liking. I like the E and B loud on the tele and strat models.
If it was the piezo's then I would have the same problem with whatever firmware I had installed. Also if it was the piezo's then different people would have volume issues with different strings and not always B and E on the same models. With v1.9 the string volumes for the affected models are fine - with v2.0 and v2.1 for some reason they become very quiet and the low E becomes as loud as the JTV mag humbuckers. Also, some people have reported that reflashing with v2.0 or v2.1 fixes the problem and the string volumes are balanced ok on a 3rd or 4th reflash, and this would not happen if it was the physical piezo's causing the problem.
There is something else going wrong here and it should be fixed so nobody gets hit with it.
Edited by edstar1960, 07 May 2014 - 07:00 AM.