We start sending PiSugar2 beta last week for some friends to evaluate!
Since the springs are quite strong, which will make it not that easy to install as the previous version, we are considering solder four nuts on the pisugar board so that you don't have to align them while installing. The case has to be redesigned to adapt this.
The i2c address we are using is 0x32(RTC) and 0x75(power ic). I found that some led phats are using 0x75, it's a disaster to write something wrong on the power ic. But since it's i2c, it seems that we can prevent this from happening, just be careful when you have a 0x75 phat. (some phats allow you to change the address)