People with problems will report these problems, people without problems have no need to do that, this might be the reason why it looks like it is a total mess.
Because of your post I will share my experiences with this router so far. The router was already running "good enough" for me on the last firmware, I had to change a couple of things in the settings. I installed this new firmware this morning, reset everything to factory default. So far everything runs smoothly without changing anything. I did disable WiFi, but that is because I have my accespoints throughout the house.
I was never tempted to switch back to my old (R2) router because the troubles I had were manageable. I'm not saying the people complaining in here have no reason to do this. Clearly there are problems for them! With this post I just want to make clear that there are people happy with the hardware and software, And I'm sure future updates will only make this a better product!
Before this update my Xbox showed NAT as moderate. After de update it shows OPEN!
I'm happy with this router, but I knew I was jumping on the train early. I know that with early releases there will always be unwanted bugs. This team seems to be on top of this and are working hard to tackle these bugs.