Okay, I've looked at the video, the exact frames you were mentioning and I've come to this conclusion:
Something is wrong with your eye, your monitor or your video player because I just couldn't see anything you've mentioned. Dragon flying unnaturally in two parts? Where? I haven't seen anything like that, that dragon was in one piece and he fluidly flew away. I saw no stale movement in the neck cutting scene at all. And the idle flame spell seem lifeless? The hell are you expecting, him snapping his finger in the meanwhile? You can easily see that those hands are actually moving, and who knows, there might be idle animation if you don't do anything for a while. There really wasn't anything unnatural in the spinning move part, the legs and the arms moved perfectly. The drawing sword scene is reminiscent of Oblivion's animation, except it's a lot more fluid.
I honestly don't know what you're talking about...
I know what I'm talking about. Whether you choose to agree with me, is a different story. Everyone I've talked to in-person about this, as well as a friend of mine who is in school studying animation and 3d modeling, completely agreed with me. I am not delusional, contrary to what you may want to believe.
The dragon's flight animation at the end of the trailer. NOT two separate parts in the trailer. What I meant was that the animation/dragons skeleton looks as though it is comprised of 2 parts, and it is executed in a very painfully awkward way. There is nothing fluid about that flight animation that I can notice, so here, I will disagree with you, but appreciate your passion in defending your own view.
The throat-cut scene, at full speed, the animation is very rigid and not dynamic. It resembles that same Oblivion or Fallout vibe to a tee, and I have taken notice.
Idle hands are not stiff and arthritic. All I'm saying is that the position of the hand is extremely bizarre, and there should be more variation to how he is holding on to that spell. It looks like a mannequin, and resembles bad habits I've seen from TES time and time again. Refer to Bioshock plasmid animations for an excellent example of solid animators doing what they do best. After all, Bethesda has admitted to finding inspiration in Bioshock for their weapons/hand system, so why not try and go above and beyond what they did, instead of cheaply replicating a similar system?
The spinning move part, I noticed that the first time I saw it. His arms are bent in the strangest positions, and it doesn't flow properly. Not to mention what the other person looks like as he's slashing him with his sword.
I am not the only person to bring this up. Several of the press reviews on their preview of the demo last week mentioned very similar things, except not in as much depth as I did based on what I saw.