Some thoughts.

1. I just use a good old match to pop out the battery. Maybe you could include a match with each Puck? :)
   
2. A setup script for the hub would be nice. I'm hestitant to try my luck on my OpenWrt router after seeing how hard it can be to set it up on a Raspberry Pi. Hope it won't be too difficult to run the hub software on OpenWrt routers with Bluetooth 4.0 dongle.
   
   

I'd definitely buy the uber-puck! Seems like we've been waiting for BME680 forever, maybe it's a vaporsensor after all :D

Edit: Just found out that it's coming out in 2nd half of 2017. @Gordon, if you haven't already got samples of BME680 you can contact this guy who made a BBQ sensor with it (he works at Bosch, his email address is in the comments):
https://www.youtube.com/watch?v=G0rcjygzmwo