I agree with you Curtis, that this set SHOULD have been done much better!!
However, in keeping with the format that they created for the 50's and 60's box sets, they should have released the 70's set in the same manner. I agree with including a disc containing live performances (to highlight Elvis in concert), as they did with disc 5. BUT...I don't agree with the way they did discs 3 & 4, which are songs that RCA considers "studio highlights"...they should have released ALL of Elvis' studio material from the 70's, just as they did with the 50's and 60's sets. I mean...there were some GREAT songs, in my opinion, that were left out because RCA didn't feel they were "highlights" of the 70's studio material, such as AND I LOVE YOU SO, WHERE DO I GO FROM HERE, NEVER AGAIN, IT'S EASY FOR YOU, etc.
And, RCA should have also included all of the "previously unreleased" songs (MY WAY, IT'S DIFF'RENT NOW, TIGER MAN, LADY MADONNA, etc.) on a separate CD, again, like they did with the 50's and 60's sets.
Now, it's true that doing this may have caused the 70's set to be a bigger set, like 6 or even 7 CD's, but in all fairness, when you consider that RCA broke up the 60's material into 2 sets (the main 5-CD "non-movie" box set and the supplemental 2-CD "best of" movie hits set), then it really shouldn't have been a big deal.
In my opinion, I truly thought that the 70's set was the weakest entry in the box set series...but then again, considering this is RCA and EPE that we are talking about, should we have expected anything less than the slighting of Elvis' 70's material?