I think another issue with hour long gameshows, both old and new actually, is more often than not you just get the same round repeated multiple times rather than different rounds throughout the show. For some shows like Tenable and The Chase that makes sense, but others would benefit from more variation in gameplay.
Well, I would agree that was the problem with the revived Celebrity Squares, but that was because when they extended it they introduced precisely one new round and the rest of the show was just the same round repeated several times, and in addition in the first episode one contestant won about three rounds in a row in exactly the same way with exactly the same celebrities. But that is not a problem with hour long game shows per se, that's a problem with Celebrity Squares being quite a dull format that doesn't really lend itself to an extended form unless you have a really great presenter who can make it sparkle (and Warwick Davis is a perfectly good presenter, but he is no Bob Monkhouse) or you add more to it.
But then back in 2001, they did a few half hour of episodes of The Weakest Link -
https://genome.ch.bbc.co.uk/schedules/bbcone/london/2001-05-17#at-20.00 - presumably as it was easier to schedule, where they went down to seven contestants and cut the chat to a minimum. But they didn't work, because without all the jokes and the insults, it was really dull, and they didn't continue with half hour shows, presumably for that reason. Similarly, one of the problems with the first series of The People Versus was that it was painfully slow, so for the second series they sped it up massively. Did it help? No, because you didn't know anything about the contestants so you didn't give a toss if they won or not.
I know there are some formats that don't successfully stretch to longer than half an hour, but we don't know if that will be the case with Wheel of Fortune, so it's meaningless to slag it off in that regard.
I never understand the idea that light entertainment includes "filler" and "padding", as if it's some sort of chore to be got over with as quickly as possible. If you got rid of the chat you could play Pointless in about fifteen minutes, but what would be the point of that? I happen to enjoy the chat as much as I enjoy the quiz. Similarly the complaints Strictly is full of "filler" - the "filler" is dancing and talking about dancing, which is the whole point of the programme. It's no more important if the contestants get a 4 or a 9 than anything else on the programme, because none of it matters.
It's like going to see a pantomime and when they do the "it's behind you" routine, standing up and shouting "it's over there, hurry up!".