thank you for the detailed reply. I have to admit, both the NEO2 and the NEO Plus2 looked so appealing with their metal cases, that I ended up ordering both. I'm happy to hear, that the eMMC performance is nice. I had not found any benchmarks on that, but found that there's real differences between the various manufacturers and models.
I also have a BPI-M2 Berry and was very disappointed, when I found out just how bad the software support is. The stock OS is indiscussable, which is how I came to Armbian. Armbian by itself runs stable out of the box, but I could not get any of the interfaces like GPIOs, I2C, SPI, ... to work at all. I had originally bought it because it's the cheapest board with real Gigabit Ethernet, because I'm using it as a network device, but overall it was still a rather large disappointment. I never wanted this experience again, which is why I was asking about the WiP status of the +2. I thoroughly searched before and after my Post, but I could not find any reason for it being WiP still, so I thought I'd give it a shot. Now I can't wait for the packages to arrive... in a few weeks or so.