First, I strongly suggest you contact
@The Piper by PM (or email). He has the best upgrade policy I ever heard of.
Trying to address your specific comments above:
* So those of us who bought the $15k Headtrip Reference (Level 2) with internal power supplies sort of got screwed?
Do you like how your Headtrip Reference sounds? If so, why are you screwed? A new equipment, even if it sounds better, does not make your existing equipment sound bad all of the sudden
* this is a big oversight to not have included an outboard power supply knowing that it’s the best solution for noise elimination
Are you also complaining that it is a big oversight by Apple not to include 12 MP camera in the iPhone 3G some 10+ years ago?
As technology advances or when we all of the sudden come up with new ideas for improvements - we test them and if that is better, we adopt it. I do not think it was an oversight but rather an idea that came up later, was tested, and as a result - adopted! Again, talk to Jeff and remember that back when you bought the amp - you would have paid extra for external PSU.
* Feeling short changed.
With Jeff Wells - you should not feel bad or short-changed!
External PSU back then would have costed you extra. What if you get the chance to pay that extra NOW and get your amp upgraded?
I will conclude by saying that during my short time of knowing Jeff - he is a very honest and fair person. Talk to him.