Syag, you are right, there are many gray areas here. One Rav who gets shailohs on this issue, says that reopening turned out harder than closing. In one nice shul here that has a lot of space, the pattern I noticed that real doctors still have masks on, while Rabbis and PhD do not. I felt like an imposter.
I am getting more appreciation for Gemora discussions where everyone agrees that 4 tefahim is too much for sechach, and 3 is Ok, but what about between 3 and 4…. These intermediate cases are really making things complicated. But if you approach it with intellectual curiosity, it feels better. In this case, I tried to balance my own view on what is right with not offending the locals. I think distance was less visibly jarring to them than being over-masked. After all, their local cougher was trecking for tissue and back as much as I did. He might have been the only one who noticed that I was making circles around him, but he did not look like he cared much.