The Soviet Union stopped being an ideological threat decades ago, and modern writers don't seem like the types to go red scare 2.0 because of China, so why can't we have any good Cyberman episodes that focus on the transhumanist elements?
With no attempt at allegory for communism, all we're left with are robot zombies.
Why not have a multipart episode that shows a society embracing cybernetics for the sake of survival, throwing away their humanity piece by piece? Instead of focusing on the immediate horror of instant Cyber-conversion like the hacks who wrote the Tennant-era Cyberman stories, writers could instead explore the philosophical questions implied in The Tenth Planet: "what would you give up to survive? Is being competitive worth the price of fundamentally altering your body and mind? How much of your humanity could you give up before there's nothing of 'you' left? Is there inherent value in maintaining an unmodified human form?" There's all sorts of ways the potential horrors of transhumanism could be examined, but nuWho consistently disappoints on that front despite having no compelling ideological reason to do so, unlike Cold War era authors of Cyberman stories.