They talked about, among other things, how they had to:
- digitally replace the stunt man's face in many of the action shots because his jawline was too dissimilar to Robert Pattinson's.
- digitally modify a hand because a prop gun misfired in a shot
- enhance the fight scenes to look more visceral and violent
- add rain and rain spatter to the car chase (the parts that weren't already fully digital)
I'm no filmmaker but I felt many of those things could have been done without VFX. Hire a stunt man that looks more like RP, reshoot the scene with the broken prop, forget about rain and/or tone down the epic action set piece, etc.
Instead it seemed like it all just came to rest on the shoulders of the VFX artists.