I'd like to add a word of caution. I have no doubt that you do "prefer life as it currently is". However there is no guarantee that the situation will remain so rosy. My 1st and 2nd ribs are (were) fused, and your symptoms largely match what I experienced during the 1st year of discomfort related to TOS. Things got progressively worse for me from that point, until the surgical option seemed heaven-sent as it represented my last chance at restoring my arm to a degree that it would be able to perform even the most basic activities.

I'm just 2.5 weeks post-op so I cant add any details from personal experience (yet). But my surgeon was far more optimistic when describing the possible outcomes than a lot of the stories I've read on this site. Don't despair if that's what things come to. If you do opt out of surgery make sure not to ignore any additional symptoms that may develop over time.

-Ben