I've seen very mixed refinishing results from BUK over the years. On some occasions I've been convinced the AD has refinished the watch badly as I couldn't bring myself to believe that Breitling could make such an appalling job of it, but I have absolutely nothing to substantiate that claim so I'd never state it as fact.
I could have a go at answering a couple of your questions, from previous experience.
Q1 - BUK previously told me they take numerous photographs of a watch when it comes into their service centre. If this is the case, then there should be very clear evidence of the condition of your bezel.
During the quartz service video, (available on youtube) you can see the movement being placed into a test fixture. You would hope they also time the watch as part of the QC process.
Q3 - Module swaps seem to be more common with quartz pieces.