There isn’t much risk. The bootloader seems to have a separate USB driver, so you can always reprogram if you mess up SYS / APP.
But yeah, bluetooth is nicer for it’s wireless characteristics… I think if you switch to a bit smaller battery, there is enough space for bluetooth module in the battery bay.
AAAND, regarding the exploding batteries, my battery puffed up just a week ago (did not explode though) 
Though it may have been because I have a habit of leaving my quad near the fan exhaust of my laptop where it gets quite hot.