BvS is the most underrated piece of pop art I’ve seen in a decade

I'd actually say BvS is the second most underrated because Watchmen (2009) didn't get the attention it deserved. I wrote about it here: https://steemit.com/entertainment/@d-zero/watchmen-2009-review-the-perfect-comic-book-movie-from-zack-snyder-who-could-be-the-stanley-kubrick-of-our-generation

I think Watchmen is THE comic book movie. It has got it all. There is not a single bit about comic book stories that isn't grasped by Watchmen. I liked both Watchmen and Dark Knight Returns Part 2 more than BvS. After those 2, BvS is my favorite comic book movie. When it comes to Marvel, Age of Ultron was the only stand out awesome movie. It's way ahead of the rest of the Marvel.

Comedian and Rorschach are not Batman and Superman – they’re comments on Batman and Superman.

I not sure how you drew the Batman-Superman parallel. But I agree that they are commentaries on comic book characters.

But in BvS, Snyder tries to get to the very heart of what our epic heroes mean to us. He filters our murky sociopolitical moment and the essential American culture war of the secular vs the religious through a pop art clash of the titans.

The disappointments come because this clash wasn't full blown. Both characters were made Reluctant Randian.

Bruce, please...
I was wrong. You have to listen to me.

Breath it in. That's fear.
You are not Brave. Men are Brave.

The script just summarized what is practically a Greek/Shakespearean tragic clash. But a movie isn't a script. In theater people try to imagine based on the script. In movies people expect to see some one flesh out the imagination for them.

Everything was perfectly in place. It was a sequence that should have taken 20 or at least 15 mins and they only used a few mins. Attack on Titan and Tetsurō Araki's other anime handles these kind of situations really well.

The Day of the Dead scene might be the most incredible moment I’ve seen in a superhero movie that wasn’t directed by Christopher Nolan

Disagreed. Nothing Nolan had ever directed had given me the same impact of that entire sequence. I'd say it's one of the greatest scenes ever made in history of cinema. Watchmen had close calls. I have a hue problem with white lies. Some of the most powerful scenes from Nolan's Trilogy are based on lies. Lies done for the good lacks impact for me. They seem like a compromise; a less brave action.

Snyder is the first filmmaker to make Superman truly awesome

Like a small minority, Man of Steel was the first time I ever loved Superman. It was realistic and powerful. Transformers had to make Transformers have weak armor for the movie. In the cartoons it once took a canon that was supposed to blast off Earth into pieces and Optimus faced it point blank. Snyder doesn't make Superman go under-powered but he did make the Batman's suit under-powered. Bruce could have had something better.

Batfleck is the most "Batman" Batman

He was perfect for the movie. I really liked Bale and Michael Keating too. But when it comes to other elements like gadgets, Batflek is THE Batman. The original comics had a Batman that actually kills. Nolan was the one who popularized no-kill rule. Here is a cool review from @vimukthi about the 1989 movie: https://steemit.com/entertainment/@vimukthi/retro-review-batman-1989-the-movie-that-made-comic-book-movies-a-thing-that-also-did-everything-about-batman-before-they-were-a Batman blows up a factory with a bunch of Joker's goons in it.

Snyder may have been tasked with launching the DCEU, but instead he made a movie so big and so bold that it renders most other superhero movies insignificant – including the very franchises it was meant to inspire.

True. I think Zack could have done a great JL if he was given creative freedom and the tragedy didn't struck him.