Just picked up a used AmPro P V. Like others, I have the same lackluster performance from the E (and the B, in my case). Curiously, the A sounds more like the D-G, even though it's on the same coil as the B-E. Thought it was just a setup issue, but I've adjusted string height, pickup height, playing technique, pick/fingers, EQ, strung through the bridge instead of the body...nothing is bringing it to life.
So she gets a new P/Up. For what I paid for it ($900, and it's a 2017 in almost mint condition), I'm not going to complain about having to replace it. I like the innovative thinking, just not quite down with the results in this case.