The "Red" Remote functionality does indeed bypass the toggle, and now the toggle re-engages when the remote plug is removed from the jack, all as intended! I just need to figure out where to wire in a red LED to indicate when the high-gain channel is engaged.
I don't have a ton of variety in my resistor stock right now, so after trying 470k in R7 and still wanting for gain, I ended up going with a 1M on the board and a 1M and a 470k wired together in parallel to bring the low-gain channel to 242k, not too far from the stock 220k. I'm super happy with the higher gain setting, and I love that the low gain is still intact. The 470k was a very comfortable middle ground, and I hesitated to push it further, but rather than keep turning my boost on in front of it (which not everyone might have/want to do), I found that with the 1M you can just roll your guitar's volume back and still hit that sweet spot.
I might try another tweak here or there down the line.