I was able to get the driver loose, took pics, hopefully I'll get them up soon. I was able to poke a solder pick tool through the LED wire holes from the top, applying pressure, and broke through the epoxy seal of the driver. It's a two piece driver - one board is the contact board (plus electronics), the other is screwed to the top of the pill, which is the solid shelf the MCPCB sits on. There's a wire harness connecting the two boards, so doesn't seem possible to easily separate the USB charging from the driver electronics.
Good news: the driver can be replaced (stock driver contact board is 21 mm 29.8 mm x 2.05 mm)
Bad news: if you replace the driver, you will lose USB charging, and you would have to glue/epoxy the driver back in place
There's also a 4-5 wire harness coming from the switch, but being there is blue and red LED's on the switch board, that makes sense.
Weird in that the 2nd PCB that holds the USB connector is mounted on the pill top - that has to get pretty hot from the copper MCPCB.
My plan to modding this would be to piggyback in a 17mm FET+1 driver using Narsil, scrap the USB charging, removing the 2nd PCB mounted to the pill top, and going with a dedomed XM-L2 U4 1A, so I can use the existing centering piece. Lumens and throw should be increased, keeping the max draw on the battery about the same or lower.