I took the YNC SWE as well. For now I'll say I think I did average. I'm not sure. It's my third SWE for Chief, and so far the one I was most relaxed for. There was definitely material that I didn't know, but also plenty that I did know. I thought it was a good test. I didn't have too many computations (thank you SWE writer!) and there were questions I hadn't seen before. Only time will tell....
I wish the NOV SWE cuts would of came out after the test. Being one under the initial cut didn't really motivate me to study hard again. With that being said I think the YN1 test had a lot of new stuff but we will see in a few weeks.
Don't worry my crystal ball says you will be fine. One away on the intial cut, I'm not super brave but I might just have went in put my name on the test and walked out.