No, I think that while non-autistics certainly have a primitive evolutionary advantage over autistics, autism is better for anything that has to do with peace and civilization, non-autistics are often savages, their condition appears strongly linked to religiosity and tribalism.
Automatic social mimicry for instance certainly has a benefit, some other ape gesticulates that there is a danger, the non-autistic can read it and starts automatically mimicking, runs away from the danger and survives longer as opposed to the autist not getting the social cue. However, the same function is also what makes it possible for some psychopathic Hitler type cunt to angrily gesticulate in front of an audience of retarded non-autistics and get them to do what he wants. At some point they'll start automatically socially mimicking, Hitler was in fact well aware of that and had one or two quotes related to this phenomenon.
Same for their general inability to be as analytical as autistics. Evolution didn't necessarily favor a completely accurate perception of reality, a non-autistic caveman hearing noises from a bush, running away fast in perhaps right perhaps wrong belief that there is a wild animal waiting to attack survives longer, an autistic not able to create a fantasy world in his mind, insisting on continued detailed analysis of the situation is more likely to get eaten by the wild animal. Normal humans didn't evolve to have an accurate perception of reality likely for this survival benefit, but it is still a disaster for civilization, it's likely the reason why they delusionally detect threats where there are none, such as in underage sex for instance as opposed to a more rational autist.
So that's the point basically, surely I can see why most humans evolved to be the way they are these days, but just because it evolved to be that way doesn't necessarily mean it's good, surely rapists and psychopaths also have a primitive evolutionary advantage over non-rapists and non-psychopaths, but that doesn't mean their behavior is in any way conducive to a peaceful civilization with consistent ethics.
So are we the next step in evolution? Probably not, but I just don't accept evolutionarily advantageous as a synonym for good, I think that many that evolved to be more analytical and questioning would indeed not even want to reproduce to begin with and tend more towards antinatalism, there is no reason to assume non-autistics are truly better just because they have some kind of primitive evolutionary advantage, it's not all that matters. They certainly want to reduce at least their suffering and would themselves also benefit greatly from a more autistic way of thinking that could strive to do that, but their primitive social instincts always stand in their way.