I have one since a few years, passed twice (the last time two weeks ago) without it even getting mentioned.
Not passing will simply mean that you have two weeks to fix whatever they deem in need of fixing (the details may differ a bit by canton, not sure). In some cantons the confirmation of the repair can be submitted by certain garages, no 2nd visit to the StVA necessary.
Pretty sure that will be OK if you get rid of those bits sticking out. 80 grit sand paper, trim with a knife and / or similar. I have been told to fix a bumper, cracked 2 inches long from the inside edge near the body towards the outside of a corner (top face only). Vertical Outer surface was perfect, no obvious snagging points, Zurich STVA. It wasn't the sole reason for failure, but they said it was not acceptable.
Yes a visual check of brake disc thickness, and pad thickness if visible. My brakes were working absolutely perfectly on the rollers, and the brake disk surface was perfectly flat. There was that lip from wear on the outer edge. One headlight was out of alignment, so no pass on that day. So either fit new discs or written verification with a garage that discs were still in spec.