Yes, bizarre is a good description for this post. It is definitely not the best build, especially it isn't consensus if you read just some feedback about it!
Performance-wise it is the best W10M so far, I fully agree. But previous insider builds had far less problems on my 1520. That is OK as it is a bloody beta. But it is just bizarre that those who are lucky to face no real problems sum up that there are no problems and the version is next to final. I mean, that is what testers are for, to show up the problems, aren't they? I would imply that most of those who mention problems here and in the feedback app do this to get a nice final product.
However, I might be wrong but I do not recall reboots and crashes when I was at home and connected to my WiFi. Could it be that some of those problems are connected to the cellular hardware, maybe when using particular bands with a particular device? You know that we all still use 8.1 firmware.