I agree that the close ups should've had more emphasis on practical effects. The test screenings had them apparently, so hopefully that is put in a new edit!
I can accept the CGI shots of the aliens moving fast, though Chris Nolan's rule of thumb about seamless CGI is what works best in my opinion. Alien 3 probably had the most seamless alien effects (albeit NOT CGI, or barely...) of all the films, and I always loved the execution of the Dog/Bison xeno. So many great creature shots in that one. Man, when it's fighting Ripley with the tail?!? One of the coolest shots in the series. And not since that one have we gotten to see the xenomorph do anything remotely interesting, I mean compared to this who cares about pulse rifles?
The Neo/Xeno fight being left out is overwhelmingly disappointing, though I do enjoy the movie for what it is. It just would've really worked to show us something new regarding the xeno. Could've worked great alongside David and Walter's fight too.