Except writing the essay
That is a big except, actually. You made the test 30 minutes shorter for yourself and you also didn't have to spend any brain energy writing / answering that question. That's likely going to inflate your performance on the later sections of the test. Take tests under 100% official conditions, including all sections, from now on. :)
The data that you gave me is not actually useful in determining strengths and weaknesses or figuring out how you did. In addition, your question about the % of 700-800 questions on the real test... it varies for every person depending upon how they're doing on the test. I think it would be very beneficial for you to learn more about how the test works. The short answer is, at the level you're scoring, yes, you should expect to see pretty hard questions. (But that's true for anyone when you add the words "for you" - everyone should expect to see hard questions
for them because that's how the test works.)
Take a look at the Scoring section of our free e-book The GMAT Uncovered. If it gets too technical (there's one section that's very technical), you can skip that section.
Give your brain a chance to rest / absorb, then read this:
https://www.manhattangmat.com/blog/inde ... lly-tests/http://www.manhattangmat.com/blog/index ... -the-gmat/Finally, keeping all of that in mind, use the below to analyze your most recent MGMAT CAT(s):
http://www.manhattangmat.com/blog/index ... ice-tests/Figure out what you think you should do based on that analysis. Then come back here and tell us; we'll tell you whether we agree and advise you further. (Note: do share an analysis with us, not just the raw data. Part of getting better is developing your ability to analyze your results - figure out what they mean and what you think you should do about them!)