Don't get why some people are so upset at the incest not happening, I mean sure it would have been nice but the story is still kickass and the couples that have come in place of the incest one are still pretty awesome.
The story is incredibly boring, and the only redeeming part of this manga is the yuri, and so when the author manages to ruin that as well, people are going to get mad.
Right from the get go it's shit, because it was a bait-and-switch; the incest was teased very heavily for almost the entirety of the series, and now that's doomed.
Miyuki and yuri were so close, that for them to suddenly get paired up with other characters, with 5 chapters left is absolutely terrible. Not that a change like this would've been acceptable (to me) no matter how it was done, but I think that's a valid point to make, even to those that don't care about ship-changing.