Re BvS: I felt the extended cut really made the film complete, and I wish they would have released that in theaters. Though I understand WB's hesitation with that.
On SS: Not surprised by the reviews... the trailers didn't look great to me, and I've never been a huge fan of the concept. That being said, I'm a sucker for the DCEU, so I'll be seeing it.
--
Moving on to Star Trek... I found Beyond to be a very enjoyable and balanced film, which the trailers did not show me. Heading into it, I was worried that it was going to be a mess. The first 30 mins or so of the film gave us some of the 'downtime' greatness that Star Trek is famous for, and I wish we had a show, or a few shorts to flesh out the crew more in between blockbuster movies. The story itself was interesting, and I'm glad they are exploring new characters, since they have the freedom to do so. The arc of Kirk's maturation has been really strong, and Bones/Scotty got more play this movie, which was much needed. The climax of the film was pretty cheesy, but so much fun. Overall I'm enjoying the Trek reboot. I wasn't huge into TOS, but I am a gigantic fan of the TNG era Trek shows, so YMMV depending on where you come from as a fan. I'm really looking forward to the next movie, but I do worry about the series longevity since box office receipts have been disappointing. I will say, with the strength of the acting, I think they could go with a smaller budget more character driven movie, and do just fine, if there's worries of making money back. I enjoyed the small moments they took to honor Leonard and Anton, they'll be missed. Chekov had his moments in Beyond, but I don't think the character is mandatory for the series. In fact, I'm kind of excited to see them bring in a new character, instead of re-casting, further giving the series freedom to move in various directions.