Oh? You think that Ranma having an interest in Usagi will decrease tension?
Heh, I'm not to sure about that.
Directly, no I do not. Indirectly, yes I do.
The problem I have is a Ranma/Usagi relationship fits too nicely in with too many other peoples plans. Setsuna's for one (though probably not now, I meant originally). It also would give credibility to Usagi's dream. I also think it would nicely solve some of the issues the company is concerned about. They seem to *want* a united pattern silver front.
Except for Usagi, who likes Darkstar, and Ami, who respects Darkstar, the senshi do not seem to overly care for the demonic brood, or Darkstar.
Of course, since Ranma and Usagi are on the rebound, it could fall apart. That would be good for keeping tension up.
Personally, I'd rather have Ranma with Kasumi, perhaps she would come around, perhaps not. Or better yet, the two school friends of Sunshine's.
It is of course your story, so take it where you want, but that is my opinion of the situation.