Hey scandin9,
I can't give you any specific advice on your questions without reading your writing; so take what I say with a grain of salt.
Usually, the more concise your language, the more points you are able to make per hour in any essay; therefore, the more marks you get in an exam. That is not to say however, that some embellishment will not be rewarded in the exam.
I normally advocate a 1200 word long, 3 body paragraph essay. I am also a proponent of the multiple idea paragraph. However, I also understand that, if done incorrectly, such a paragraph can come out as disjointed and verbose.
The best thing to do is to get someone to read your writing and give you some real feedback on how to solve your verbosity, if it does indeed exist. Often, it comes down to control of language.
To give you an idea of how it can work out in the exam, I wrote an average of 2.75 pages for each English essay in VCE and scored 50. A friend wrote an average of 4 pages each and scored 42. They were both respectable scores, but it also illustrates the importance of having control over your language and expression.
All the best,
Yang