Mathematically though, all of the loading is up and down, which is held by the wing tube or whatever they use on those planes. I do agree that the tape is not a good idea, but if you fly it how it is designed, it will hold together.
The epoxy does give a stronger bond and will keep it from breaking under high G loading, or during barrel rolls where there is a "centrifugal" force "pulling" the wings off of the plane.
That being said, if it was mine, I would epoxy it. But I'm not 100% wrong on the point. If you analyze it mathematically, it makes sense.
Anyway, glad they replaced it. Hangar 9 has always had wonderful customer service. Seems like you had the same experience
Have fun flying!
-Eric