I agree with you. I think a total swap could be a good thing because it would keep the overall quality of the device higher for the average non-tech consumer. I'd recently purchased a refurb 24" iMac from the Apple Store and I swear I could not tell it was used because I inspected it all over and it appeared to be brand new. It was flawless and has been running perfectly, 24/7 since I bought it in September of last year.
I think people tend to get worked up whenever they hear about paying money for a battery replacement. $100 for parts and labor doesn't seem too out of line in this day and age. I wonder if all tablets will have user replaceable batteries or will the iPad be the only exception. We'll see if this battery swap procedure will bother the average consumer that much. I doubt it.
I'm extremely interested to see the iFixit teardown report when it comes out. I wonder if it will even be feasable to replace the battery yourself.