TMitHC was still good; it's just... well, it's Dick. What more can I say?
It's more a piece of worldbuilding than it is storytelling, and the ending is typical Dickian WTF, so I have a higher opinion of the series than I do of the book.
Interestingly I misremembered the nature of the book-within-a-book The Grasshopper Lies Heavy which purports to be a novel about a world wherein the Allies won the war. I remembered it being an account of history as it happened in our world, but no - it's another level of alt-history wherein FDR did not continue as President in 1940; a different president not from our history succeeded him; furthermore when the Japanese bombed Pearl Harbor the loss was minimal as most-or-all of the ships were out on maneuvers. And there was a lot about the post-war reconstruction wherein the USA raised the standard of living for poor people in China - I bookmarked all the pages that described passages of the book, but before I could return to the text and take notes, the library loan expired and the book deleted itself from my devices. 
I liked the WTF ending, that (SPOILERS...)
purported that the i-ching was either God or a cross-dimensional force that held at least two parallel universes together, and effectively authored the book, suggesting that in the parallel world where the Axis didn't win their version of The Grasshopper Lies Sleeping was about the world where the Axis won. With the universe operating like a weird infinity symbol.
I had a hard time with the show because it was much less plausible for someone to create newsreel footage than it was to write. I didn't manage to stay involved with it to the end because that was too much of a suspension of disbelief even for me. Cary Tagawa was awesome though.
Still prefer Do Androids Dream of Electric Sheep and a whole mess of his shorts to TMiTHC, but it's still one of the better thought provoking reads ever. Did you ever read much Vonnegut? I would recommend Mother Night as a companion piece to TMiTHC
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