1) It's a crossover. Ranma went into the 'The Wotch' world.
http://www.thewotch.com/
2) When you talk about bashing, do you mean the NWC's reaction to Belldandy? That's just for comedy purposes. The NWC won't appear again in the story, at least not for a very long time. I think you can only call it bashing in a more serious story, but since this is comedy I don't think it's really that out of the place.
Maybe you could be more specific and tell me what I should change. I'm always open for suggestions.
3) Belldandy won't appear much in the future. She was mainly the means to send Ranma to the other universe.