It's being reported that WB execs tampered with the film so much, and all of them had so many different "visions" of what the movie *should* be, that there are a bunch of different concepts of the movie that are sitting on some shelf somewhere, and this film tries to blend a bunch of them together, which is why it's being viewed as such a mess.
Also I must say, I can't help but laugh at David Ayer who took to the Suicide Squad premier and proudly proclaimed "F*** Marvel". If you're going to be a dick about the competition you best have a damn good product to put out there, and Ayer apparently simply doesn't. And it's a shame because the DC "fanboys" are treating these movies like the second coming, when they're simply not. DC fans deserve movies that treat the characters with a semblance of respect and - purely off BvS and MoS alone - the DCCU doesn't.
Anyway, I unfortunately was convinced well in advance by my brother (one of those aforementioned DC fanboys) to take him to a midnight screening of Suicide Squad, so in just over 12 hours I'll be back to share my own thoughts about this movie.
What I *will* say for the DCCU, is it's not actually depending on Justice League imo anymore. Loads of people who saw BvS aren't holding much hope for that one. Their "make or break" movie now is genuinely Wonder Woman. If they mess that movie up after the trailers got everyone hyped, especially with the whole aspect of being the first female led superhero film, you can guarantee that'll be the death knell of the DCCU.