Beautiful guitar!
Here's it's Sister- a 2005 Ultra.
Thanks for posting- great read! As you mention, I think Heritage started off using Schaller as Gibson was using Schaller hardware, etc in the late 70's/early 80's. So when Heritage opened, I'm sure it was easy to just stick with things that were already being used. I have never had a problem with Schaller pickups. I know so many do, but they've always worked just fine for me. And at the end of the day, it's all opinion. One person thinks Schallers sound terrible, then the next person has found their dream tone. There really is no "one sound fits all" in the guitar world, and thank God for that!