Dude, I have beaten Ryse officially now twice beginning to end on the second hardest difficulty (first playthrough) and the hardest difficulty (second playthrough). Ryse does not, I repeat, does not have bad or lackluster performance at all. This much I'm certain of. Ryse's performance is great throughout the entire experience. You are going based off of framerate anlysis videos that give a very misleading portrait of what it is like to actually play and feel the game yourself.
According to framerate analysis videos, there are dips below 30fps mostly during executions, which are already slo motion to begin with. This fact has literally zero negative impact on either the speed of the executions, or your ability to carry them out successfully. In other instances, you'll notice drops in situations where it doesn't even matter, or when you don't even have control of the game because it's going into a real-time cutscene. Ryse has solid performance, and my 2 full playthroughs of that game supports this. My beef isn't necessarily with games being 30fps. I'm totally fine with 30fps games. Halo 4 is 30fps and one of my favorite last gen games. In fact, my favorite games of last gen were, by a large majority, 30fps titles. My beef in this situation is that a dev, in order to hit 1080p on both systems, seems to be shortchanging one of the next gen console versions of their game Essentially offering 30fps edition and 60fps edition.
I've never been annoyed by any of the resolution differences up to this point, but this I legitimately find annoying. Also, my tolerance for framerate is by no means absolute. It really does depend on the game I'm playing. Example, Blue Dragon, one of my favorite games from last gen is a very solid performer majority of the time. However, strangely enough, the ugliest portion of the game, the wasteland, also happens to perform by far the worst. Performance there gets downright unbearable. However, in the game's most beautiful battle locations, performance is flawless. Just as I wouldn't use that wasteland section of Blue Dragon to condemn blue dragon's performance as a whole, I will not use situations that I feel are perfectly reasonable, or that in no way take away from my enjoyment of a game to condemn others. And, just to add once more, performance in ryse never gets as bad as it did in what I consider the least impressive looking section of blue dragon. The most impressive scenes in Ryse all perform perfectly fine.
This is no longer pre-launch speculation from watching DF videos. I've played it for myself, not once, but twice at the most difficult levels.