Yes, the Donald Cotton stories got reassessed a bit in the 90s, when the Williams era was reassessed too, but it doesn't seem to have resulted in a permanent change for any of them.
Personally, I like The Gunfighters, but the end is a bit odd in terms of its treatment of the regulars. It probably does assume a familiarity with Westerns that is no longer widespread, while Wikipedia suggests that very few things here were in any way historically accurate. I suspect the bottom line is that while fans like writers like Holmes, Davies and Moffat who include jokes, actual comedy stories seem to be judged as inappropriate, although it can be hard to draw a distinction between them sometimes.
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Personally, I like The Gunfighters, but the end is a bit odd in terms of its treatment of the regulars. It probably does assume a familiarity with Westerns that is no longer widespread, while Wikipedia suggests that very few things here were in any way historically accurate. I suspect the bottom line is that while fans like writers like Holmes, Davies and Moffat who include jokes, actual comedy stories seem to be judged as inappropriate, although it can be hard to draw a distinction between them sometimes.