Just my own musing on each symptom:
Lack of Reasoning
Alcohol doesn't prevent reasoning, but it does cause it to be much slower and be prone to mistakes. Our ancient ancestors most important use for reasoning was probably for hunting, to figure out how to find the prey and then how to trap it and kill it. Less successful hunts means less food, and less people that are able to survive. If the lack of reasoning is so important that hunts will fail entirely, humans may not be able to spread quite as far as we did and would have to survive more as scavenger/gatherers in ideal climates rather than hunter/gatherers across the globe.
Lack of Reasoning would certainly slow us down, a lot - but it wouldn't necessarily kill us as a species.
The euphoria experienced is, in my opinion, what causes people to be somewhat more immune to pain while drunk - but this is more negative than positive. Pain is meant as a warning that your body is under stress and can't take the beating forever. As a one-time circumstance, like during a fist-fight, this could be a good thing - but if people are naturally stressing themselves over that limit every day, they won't stop until their body is seriously harmed. The other negative aspect of euphoria is that it makes it harder to have motivation to do other things. Such as finding food. So not only are we worse at finding food due to lack of reasoning, but we probably feel hunger later from the slight immunity to pain, and then are less likely to act on the hunger for a bit after that. The good news is, small pain wouldn't stop us from finding food, even if it eventually kills us.
From a societal point of view, this would probably balance out. People would do things or say things more easily, but also be more accepting of things. From a survival point of view, it means we are more likely to try new things. Most of those things will not work - but the things that do work will be found more quickly. The trade-off here is that more people will probably die, but we will find new things faster - though the lack of reasoning takes away from this substantially.
Extroversion and Lack of Depth Perception
are secondary effects, in my opinion. The extroversion is a result of all three of the above traits. We feel more willing to share and connect to others and are more willing to overcome emotional insecurities because of the euphoria and disinhibition. The lack of reasoning helps prevent jealousy or making connections like, "If I help him, it makes it harder for me." The lack of depth perception comes from the lack of reasoning - it is harder to connect what we are seeing now to what we have experienced in the past for how far away something is or how much motor control to use. The overall effect on our survival is that we are more accepting of others and again - suffer negative aspects to the hunting part of our culture.
Overall, if we are living in a region where food is easy to find and there aren't a lot of things around to kill us through careless accidents, I think we would survive, though with less numbers. Technology would probably advance more slowly, and we would be stuck in certain global climates until technology advanced enough to move out farther. Society might be more careless, and more forgiving of its members when careless doesn't get someone killed.