These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Special Effects Failure: Looking at this version, a lot of the CG shots are pretty apparent (especially in the scene where society collapses around Ana as she's escaping from her neighborhood). Takes away a bit from the scare factor.
In the DVD commentary, director Snyder cheerfully points out a specific example- when they cobbled together the overhead shot of Ana's neighborhood via CGI, they failed to give some of the houses any street access.