the wording in the first paragraph just doesn’t strike me as business-like. It’s a bit wordy which you don’t want in a query. The assumption is that it’s complete so I wouldn’t mention that. And you don’t become family with publishers so I’d really cut that part. I mean all you are really saying is that you think they’ll be interested because it will fit well with their catalogue.
As for the word count, that’s close enough to the standard not to worry about. Believe me, if they want something added in edit — they’ll have you write more. (Speaking from experience)