I don't personally view them as "lesser" episodes, just episodes - but that label still doesn't change the fact those scenes are, well, gratuitous. That's all.The problem with the MU scenes wasn't that Kira was bisexual so much as that she was a predatory nymphomaniac.
DS9's got it's problems, but it's hard to compare the importance of the problems of a few of a series' lesser episodes than the problems in a two hour movie.
It's easy for me to compare intent, and I don't think the "two hour movie" has any problems worth mentioning. In fact, it's one of the best Trek's in ages.