RCA killed the momentum that Elvis had build up in 69/70 by releasing EVERYTHING that Elvis had recorded in the many, long recordingsessions. Many of the tracks simply shouldn't have been released.
Hey Jude/Yesterday in 1970???? Covers like that should have been seen as a personal (private) favourite of ELvis, that happened to be recorded during a session. But that doesn't mean that it should have been released on an album.
Some awfull songs were put on albums, while other great songs were only available on single (sometimes even as a B-side).
RCA couldn't handle the huge amount of recorded songs and simply decided that they had to release everything as if it was 1956-1958 again. They obviously hadn't learned anything from the overkill policy that they used on releasing soundtracks and singles during the 60s.