They are not going to break up now and it would be stupid to write the partnership off based on one skate, or how they acted in the k&c. I'm not surprised to see them, especially him, sitting there looking shell shocked - even just thinking about the scores, he's never had scores that low, even in juniors, and 8 months ago with Elena 67 would have been considered a slightly disappointing short dance. So the dazed and shocked look probably comes in part from suddenly having to re-calibrate the ideas of what they can expect to achieve this year.
There's enough there for them to become a good team, although for the moment there are still glaring deficiencies in her skating and expression, and his stability. The biggest challenge at the moment is for him to wait for her to get up to his level in basic skating, and not go all out when she obviously still can't keep up. He was at times really pushing her round yesterday and you could see it was causing her to make small errors, even before the fall on the lift unsettled them. He's got to accept that for the moment she doesn't have the skill level that his former partner did, and so he's got to dial it back so they look like a real team - even things like the exit of the twizzles, where he got right down in his knee, and she didn't, it made the whole third set look completely unsynchronized, and while it's a nice choreographic touch, if Victoria can't execute it to the same standard, leave it out, do something simpler that looks better for both of them. That's what will help them develop, and learn to trust each other on all the riskier elements. Then next year if she's improved the basic skating skills, amp up the difficulty, speed, power & so on when they've build more trust & understanding.
(If she hasn't really improved by the end of the season, and he's not taking on more of a partnering role... then I would start to question whether this has much of a future. I don't know much about Victoria, but Nikita has always come across as very ambitious, and I can't see him being happy in a team where he has to skate below his level to match his partner, or one that's constantly making mistakes.)