No, that’s not what the analysis said. It said that the one pair of aftermarket cushions were of inferior quality. No findings were made of all aftermarket cushions.
But you paid 300-400$ for headphones, to me it's worth paying the OEM premium just to make sure they keep delivering the quality and experience I was looking for initially when I paid the high price. Otherwise, you might as well buy the lowest priced noise canceling headphones: you'll get a commensurate experience but you won't break the bank.
Anyway, to each their own :)
The problem is aftermarket cushions may not do as good of a job at passive noise reduction.
Follow the link and check if you have the right number of clips on your aftermarket cushion. Obviously this isn't the full picture but is certainly a large piece of it.
And I am the guy who spent 4 times a few hundred on AKG studio headphones but replaced the ear cups with some much, much cheaper but better feeling ones.
To each their own :)