The pacing really annoyed me.
From a technical standpoint, it was incredibly well paced, with a very steady progress through the plot.
However, in terms of momentum, I found SF somewhat lacking because it took so damn long to do everything. Apart from the PTS, which I loved, the scenes drag as Mendes obsesses over the pauses between actors' lines. Sometimes this is important, like when Severine talks to Bond about Silva in the casino, but overall I get tired and end up counting the seconds between lines. It adds a good 5 minutes or so onto the running time.
I wonder if some people don't notice the length because SIlva's only in it for an hour? It really picks up when he comes on screen, and feels like a whole new story. The first few times watching it, the forty minutes between the titles and Silva's entrance dragged for me so much,
Other niggles: Moneypenny's AWKWARD reveal. Eve and Bond's AWKWARD chemistry. Eve and Bond's AWKWARD one-liners. Thomas Newman's alternatingly brilliant/bland score.
This isn't a flaw so much as a failure on my part: what does Bond's Circle of Life one-liner mean? I still don't get it.