Any album after that was to me IMNSHO was non-Prog 80s Pop nonsense and The Phil Collins Show. Although not my kind of thing, Collins was a brilliant Pop writer, but a mere shadow of his excellent Brand X-level musician's musician.
I agree, with the exception of
Duke. There were signs of things to come on that album (really lousy pop ballads) but there was still some good stuff on there - they still had a foot in prog.
Remove "Misunderstanding", "Heathaze", "Alone Tonight", and "Please Don't Ask" and you're left with a pretty good album. Yes, I left "Turn it on Again" off this list but remove that and that's a pretty short album, plus, that song has grown on me over the years (even "Misunderstanding" is catchy, just would have been better as a non-album single).
Reminds me of Yes' Tales of Topographic Oceans where some real heavy editing would make that a great album (like removing 5 or 6 minutes from the 1st track, 10 minutes from the second, and eliminating the 3rd track entirely).
But yes, Hackett leaving really changed their sound even more than Gabriel.
And Then There Were Three has a few really great songs ("Down and Out" and "Ballad of Big" are faves of mine), but mostly it's a weak album, overall for me -
Duke is the stronger album, even if it is less "proggy".
They lost me after 1980. Though, I admit to really liking "That's All".