Cutscenes are still extremely laggy after patches.

I was having some major problems like you describe. Hitching and stuttering when entering/exiting cutscenes. Some cutscenes would tank FPS down to under 10 fps. Even zooming into the war table would cause this. Made the game damn near unplayable considering how many cutscenes there are.

Suddenly, I have it working perfectly (except for SLI flickering). Since you are running the same driver version as I am, we can count that out. I also read somewhere that the terrain setting may cause stuttering in cutscenes, so I did drop that down to "high" from "ultra".

Another thing is I am also now running flawless widescreen in the background (I am on a 21:9 aspect ratio monitor). FW made it so the cutscenes were no longer cropped at 16:9. The thing is, Hayden's notes on DA:I is that he fixed some directX issues when entering/exiting cutscenes. Perhaps he fixed it? Because now all cutscenes flow in and out of gameplay perfectly and stay at 60 fps. (I also put in the cutscene framerate command line option).

-GameTime.MaxSimFps 59.91 -GameTime.ForceSimRate 59.91+

I put the framerate at .06 under the max refresh rate the game was reporting (in my case it is 59.97, hence the 59.91).

Not sure which of these changes fixed it, but now the game runs perfectly for me @3440x1440.

I would try running flawless widescreen (even if you don't technically need it for your monitor/monitors). See if it was Hayden's magic that fixed it.

I hope you can find the combo that works for you, because it is downright unpleasant if the FPS tank during cutscenes.