Last nites HGWT episode on WC with Gene Lyons as a gunfighter was sure reminiscent of The Shootist.
IMO Episode in Laredo is superior to The Shootist (don't shoot! don't shoot!) only because the characters and their motivations were better thought out. The flaws in the film came from the script (IMHO).
In The Shootist the three bad guys at the end were cyphers, generic targets. IMO it's more interesting when there is some understanding of the reasons for the conflict. Richard Boone thought so, too. His line, 'That was for Albert,' was his own idea. (I'm paraphrasing the line, I don't have the DVD/BluRay as yet, but it's on my Xmas list.)