I like how this thread went from being an innocent question to the umpteenth "Let's Bash the '77 Noise Solo" tangent.
For the record, IMHO, it's a little late to be wishing that Led Zeppelin had done anything different. Maybe it's because 1977/06/21 was my first experience of listening to unofficial Zep, but I love the 3 hour marathons. I admit I don't always stick around for Moby Dick or Over the Top, but I just take it all for what it is, and love it anyway. Like you do in any good relationship.