Since I have almost no experience with various bikes, I haven't a clue as to how well R E is put together versus these Asian bikes. I know it is good enough for me and the simplicity is wonderful. For example, I looked at photos of the two bikes mentioned above, the Honda and Kawasaki, and they both get rave reviews for everything, but I'm not sure I could handle repair on them. They don't have the openness that I've come to like on the R E.
The only thing is that I keep reading disparaging remarks about R E fit and finish. It is implied in the statement above about bikes being able to withstand winter conditions without rusting apart. I have some chips here and there that I'm waiting for the paint and stuff to fix and the paint, at least, looks plenty thick to me. The sheet metal is heavy gauge. When I posted one comment about this, the answer was given that the current R Es are at least as good as they were when make in England.
Enfield's major market is still India and I don't know whether that market would pay the high price of near perfection. And like you say, maybe it is a waste of energy (law of diminishing returns like). Kawasaki did a good job of emulating Triumph twins some years back and I think it sold well.
We do get very good value for the money, don't we? Bidding just closed on a new Electra X at about $3,200 (below reserve however) on Ebay. I think it was a new 2006 model. There were 26 bids total, so I guess it was a competitive market for it.