One of the difficulties of theses swaps in some respects is the output of some brewers is quite low over-all and if something isn't as expected, or turns south late, there is not really the opportunity to make another brew.
Part of the bad turns out to be a good chance for brewers who are less experienced to learn about how to make a better beer through tasting some examples that have issues. This is normal and a good thing IMO.
Sure, it would be awesome if we could all produce a super drop for these swaps and I'm sure that everyone who participates does try their best but there is also the temptation for many of us to try making something out of left field that we hope to be wonderful but have zero previous experience in producing.
It's all part of the fun.