i agree about learning the language of the test, and that many passage-based questions will be aimed at a discrete bit of knowledge. my only caution is that, if you use only the AAMC practice materials and work backwards, you'll be covering only the topics that show up on those particular materials, which can leave gaps and give you a false sense of what is going to show up on the real test. example: i did a really detailed analysis of the B/B Section Bank questions and found that almost 40% of those questions involved knowledge of amino acids. i then spent a ton of time making sure i knew everything about amino acids, at the expense of other topics that showed up little or never in the AAMC materials - but did show up on test day.
i do think reverse engineering from the official practice materials is an effective way to learn, especially for CARS (no other test company gets it quite right). just don't do *only* that. make sure you leave time for straight content review using the official topic list as a guide. and don't assume that come test day, you'll be able to rely heavily on solid reasoning skills to pull answers from the passage. i'm usually pretty good at that and i think it took me a long way on AAMC2, in particular, but it didn't seem to help me out as much as i was hoping on my actual test.
take all of my advice with a grain of salt for now, since i don't have my scores yet.