I recently watched the unlimited cut of BvS. The extra information received from the cut scenes makes the movie much better for me. Those plot holes made a decent movie difficult to enjoy and then even have a positive discussion about it later. I didn't hate the original coming out of it, but I wasn't impressed. I expected to have a feeling of excitement and anticipation for the next chapter/movie just like I did after "Man of Steel". I couldn't wait for the next Superman movie after "Man of Steel". I wait for Justice League with little excitement and low expectations.
With regards to the darker tone of Superman, I totally disagree with complaints about him. I like that Superman is not overly and unrealistically positive. He should be conflicted considering who he is and the shit he suddenly has to deal with virtually overnight. The way those that criticize the portrayal of today's Superman by romanticizing previous adaptations is comparable to how people legit act like America is the greatest country in Earth, for all people and all things. They want to ignore our deny the clear problems, in favor of always being positive and lying to ourselves and each other.