I'd be happy to see the Valeyard in a story...
...and I think that, like the Rani, there are a lot of voices against the return of both these characters across fandom who have simply turned up late to the parade and fallen in line with the "old guard" as it were.
I see so many fans who came to the show in 2005-06 aping the views of a particularly loud corner of the "whovian mutual backscratching society" and
half the time you can tell from the join date and date of birth on their profile whether further scrutiny is going to reveal them to be toeing the party line without judging for themselves.
I'm not saying that applies
completely to a particular age group, nor am I saying that
all those who claim to dislike the Rani and the Valeyard are doing so on the basis of someone else's judgement.
I'm just saying there
are plenty of fans who came to the show
this century who perpetuate cliched opinions of aspects of the show from the 80s in particular without actually bothering to base that judgement on first-hand experience.
It happens...
It's "a thing"