I installed the newest Beta Firmware Update 14.72. I shall provide feedback over the next day or two. The installation was straight forward and uneventful. The watch restarted as expected. Battery was at 71% after disconnecting the watch following the file transfers. After the installation was completed and the watch restarted, the battery gauge on my watch face was still reading 71%. 4 minutes after installation, the battery gauge on my watch face updated to 72%, which is very interesting, it maybe that the watch face was now rounding up a fraction from 71.x to 72. I should point out for what it is worth, that I disconnected the watch from the computer at the point at which the battery % moved from 69% to 70%.
Edit #1: Just as I posted, I observed that the battery on my watch face updated to 73%, this would be 11 minutes after installation and restarting. This is getting even more interesting.
Edit #2: Battery 74% after 22 minutes
I have a Fenix 5 Sapphire